Answer:
C. 1.6 atm
Explanation:
PV = nRT
Solve for P --> P = nRT/V
n = 3.0 mol
R = 0.08206 L atm / mol K
T = 400.0 K
V = 60.0 L
P = (3.0)(0.08206)(400.0) / (60.0) = 1.6 atm
Why water is an ampotalic specie
The oxygen atom in the water molecule has two lone pairs, one of which could be used to form a bond with a proton and, therefore, the water molecule could act as a base in a reaction. Since water has the potential to act both as an acid and as a base, water is amphoteric.
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Is starch an ionic or covalent compound?
Starch is a covalent compound because no ions is present in it.
A covalent bond is made from the mutual sharing of one or more pairs of electrons between two atoms. These electrons in a covalent bond are simultaneously attracted by the two atomic nuclei. A covalent bond is formed when the difference between the electronegativities of two atoms is too small for an electron transfer to occur and to form ions.
Starch is composed of long chains of glucose molecules that are bonded together through covalent bonds called glycosidic bonds. As starch contains covalent bonds it it, so it is a covalent compound.
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How many molecules of gold are in a gold ring that has a mass of 8.87 g
We are aware that one Avogadro constant (N a=6.022*1023; Na =6.022*1023 ) equals one mole of any substance. Since MM=197 g/mol --> n= 8.87 g/197 g/mol 0.450*10-2 mol in this instance.
When given a mass, how do you calculate the number of molecules?Determine the substance's molecular weight in units of one mole, then divide the molar mass value by the molecular mass, and multiply the result by the Avogadro constant to get the required number of molecules.
What constituents of gold are there?Auric chloride (AuCl3) and chloroauric acid are the most prevalent gold compounds (HAuCl4). Aqua regia is a solution made by combining one component of nitric acid with three parts of hydrochloric acid (because it dissolved gold, the King of Metals).
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the accompanying photo shows the reaction between a solution of cd(no3)2 and one of na2s.
The Precipitate formed is of CdS and the ions remaining are Na+ and NO3-.
The complete balanced chemical reaction is as follows:
Cd(NO3)2 + Na2S → CdS + 2NaNO3
Precipitation in an aqueous solution is the process of converting a dissolved component into an insoluble solid from a supersaturated solution. The precipitate is the solid that forms. In chemistry, a solid generated by a change in a solution, usually owing to a chemical reaction or a temperature shift that reduces the solubility of a solid.
A chemical may precipitate when its concentration exceeds its solubility. This can be caused by temperature fluctuations, solvent evaporation, or solvent mixing. A severely supersaturated solution precipitates more quickly.
A chemical reaction can result in the development of a precipitate. A white precipitate of barium sulphate is created when a barium chloride solution combines with sulphuric acid.
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What is the final step in the enzyme-substrate complex?
In the final step of the enzyme substrate complex, the product leaves the active site of the enzyme .
The whole process of enzyme substrate complex is a temporary molecule formed when an enzyme comes into perfect contact with its substrate. Without its substrate an enzyme is a slightly different shape. The substrate causes a conformational change when the substrate enters the active site. The active site is the area of the enzyme capable of forming weak bonds with the substrate. some enzyme functions independently. This shape change can force two or more substrate molecules together or split individual molecules into smaller parts. Most reactions that cells use to stay alive require the actions of enzymes to happen fast enough to be useful. It is influenced by temperature and pH.
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the isotope of an atom containing 40 protons and 51 neutrons suddenly has two neutrons added to it. what isotope is created? responses zirconium-93 zirconium-93 zirconium-53 zirconium-53 antimony-93 antimony-93 antimony-53
An isotope is generated when two neutrons are abruptly added to an atom with 40 protons & 51 neutrons. Zirconium-93.
How long does zirconium 93 last in half?Zirconium-93 decays into niobium-93m (the "m" stands for metastable), which then undergoes an isomeric shift with a half-life of 14 years and emits a beta particle with such a half-life of 1.5 million years.
Where does zirconium come from?It is used to create furnace linings, casting bricks, abrasives, and crucibles that can survive heat shock, as well as by the glass & ceramics industries.
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What is the freezing point of a solution of 15.0 g nacl 250g water?
The freezing point of a solution of 15.0 g NaCl (sodium chloride) and 250 g water is -4.4°C.
What is freezing point?Freezing point is the tempreture at which a liquid turns into a solid. It is the temperature it is the molecules of liquid stop moving really and start to format solid crystal structure.
This is because the freezing point depression of a solution is proportional to the molality of the solute. The molar mass of NaCl is 58.44 g/mol, so the solution has a molality of 0.25 m. Using the formula for freezing point depression, ΔTf = i Kf m, where i is the van't Hoff factor (2 for NaCl), Kf is the freezing point depression constant (1.86°C/m), and m is the molality, we can calculate that the freezing point depression of this solution is 0.46°C, resulting in a freezing point of -4.4°C.
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a sample of n2(g) effuses through an orifice in 125 seconds. how long will it take the same amount of propane, c3h8, to effuse through the same orifice under the same conditions?
After solving the equation the Molecular mass is 254 s is the answer.
What is Molecular mass?
Molecular mass is the sum of the atomic masses of all the atoms present in a molecule. It is an important property of molecules that is used in determining the chemical and physical properties of the molecule. Molecular mass is usually expressed in units of atomic mass units (amu) or daltons (Da). It is important to note that the molecular mass of a compound is not necessarily equal to the sum of the atomic masses of its constituent atoms, as the atoms in a molecule may be bound together by covalent bonds, which can alter their individual masses. Molecular mass can be calculated by adding the masses of the individual atoms present in the molecule. This value can be used to determine the identity of the molecule and its properties. Additionally, the molecular mass of a compound can be used to calculate the molar mass of the compound, which can be used to calculate the amount of a substance present in a given volume.
First we calculate,
Molecular mass of propane C3H8
= 3 x 12 + 1 x 8
= 44 gm/ml
Now, calculate amount of propane, c3h8, to effuse through the same orifice under the same conditions:-
[tex]t_{N2}[/tex]/[tex]t_{C3H8}[/tex] = [tex]\sqrt{28 gm/ml/ 44gm/ml}[/tex]
= 0.49
[tex]t_{C3H8}[/tex] = 125 s/0.49
= 254 s is the answer.
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What is the freezing point of a solution containing 8.1 g HBr in 100g water assuming?
The freezing point of the solution is -3.53°C.
The Chemical equation of the HBr is -
HBr → H⁺ + Br ⁻
Initial - 1 0 0
Final - 1-α α α
The total moles = 1 - α + α + α
= 1 + α
half factor = i = Total mol / Initial mol
= 1 + α / 1
= 1 + α
Now, Evolution in freezing point
ΔT f = i Kf m
kf = 1.86 (given)
m(molality = mass of solute / solvent (Kg))
Δ T f = (1 + α) × 1.86 × (mass/molar mass ) / solvent
[ α = 90/100 = 0.9 because 90% ionised]
putting the values in above equation -
= (1 + 0.9) × 1.86 × (8.1 × 1000) / 81 × 100(gm)
ΔT = 3.53°C
Then freezing point T f = T° f - ΔT
= 0 - 3.53°C
T f = -3.53°C
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Complete Question -
What is the freezing point of a solution containing 8.1 g HBr in 100gm. water assuming the acid to be 90% ionised:
[Kf for water =1.86Kmolarity^−1 ]
click on those molecules below which have a dipole moment
When there is a separation of charge, dipole moments happen. Dipole moments, which result from variations in electronegativity, can happen between atoms in a covalent link or between two ions in an ionic bond.
The dipole moment increases with the difference in electronegativity. The size of the dipole moment is also affected by the distance between the charge separations. The polarity of the molecule is determined by the dipole moment. A dipole moment is produced when electrons are distributed unevenly among atoms in a molecule. This happens when one atom possesses a lone pair of electrons and the difference in electronegativity vector points in the same direction, or when one atom is more electronegative than another, causing that atom to pull more strongly on the shared pair of electrons. The water molecule, which consists of one oxygen and two hydrogen atoms, is one of the most prevalent instances. Each hydrogen has a partial positive charge, while oxygen has a partial negative charge due to variances in electronegativity and lone electrons.
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If a ball is bounced from a building which ball is the Kinetic energy the highest? (photo attached) [i was stuck because one of the balls hit the ground and bounced back up]
Answer: The place where the kinetics energy is the highest is where the ball struck the ground.
Which will shows maximum depression in freezing point when concentration is 0.1 m?
K2SO4 has the most ions out of the options, which means its freezing point will degrade the most.
What substance has the lowest freezing point, 0.1 M?Which aqueous solution with a concentration of "0.1 M" will have the lowest freezing point
UThe answer is "K 2SO 4" ionises to produce three ions, increasing the effective molality of the solution by three times. Its freezing point is therefore the lowest.
Which substance has the highest freezing point for 0.1 M glucose?Since 1M glucose solution does not go through dissociation to produce more particles, it has a lower
which results in a higher freezing point
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What would be the freezing point of an aqueous solution containing 17g of c2h5oh in 1000g of water?
The freezing point of an aqueous solution containing 17g of c2h5oh in 1000g of water −0.69 degree celcius
What is freezing point?
When the temperature of a liquid falls below its freezing point, it transforms into a solid. According to the internationally accepted definition, freezing is the solidification phase change of a liquid or the liquid content of a substance caused by cooling.
Most substances have the same melting and freezing points; however, certain substances have different solid-liquid transition temperatures. Agar, for example, exhibits hysteresis in its melting and freezing points. It melts at 85 °C (185 °F) and solidifies at 32 °C to 40 °C (89.6 °F to 104 °F).
Hence, the freezing point of an aqueous solution containing 17g of c2h5oh in 1000g of water −0.69 degree celsius
△T f = K f × m B ×w A. w B ×1000
=1.86× 46×100017×1000
=0.69
∴ Freezing point of solution =0−0.69=−0.69 degree celsius
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Predict the major product in the reaction shown below. AlCl3
To solve this, we must know each and every concept related to friedel-crafts alkylation reaction. Therefore, the correct option is option E among all the given options.
What is Friedel craft reaction?The Friedel-Crafts synthesis is just an aromatic chemical method in which an electrophilic substitution substitution takes place. The hydrogen in benzene is replaced by an electrophile in the vicinity of a Lewis acid, like anhydrous aluminium chloride.
Friedel-Crafts Alkylation is a chemical process in which the proton of an aromatic molecule is replaced with an alkyl. This reaction happens when there is anhydrous aluminum chloride. Anhydrous aluminium chloride can be replaced with other Lewis acids, like FeCl[tex]_3[/tex].
Therefore, the correct option is option E.
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Predict the charge that a strontium ion would have. 2- 2+ 4- 6-
What mass of precipitate should form if 7.79 g of silver nitrate in solution is reacted with excess sodium sulfide solution?
The mass of precipitate that should form if 7.79 g of silver nitrate in solution is reacted with excess sodium sulfide solution is 7.98 g.
What is a precipitate?A precipitate is an insoluble substance formed at the end of a chemical reaction that involves the reaction between two soluble substances.
The precipitate comes out of the solution and settles at the bottom of the reaction vessel such as a test tube.
The equation of the precipitation is given below:
2 AgNO₃ (s) + Na₂S (aq) ---> Ag₂S (s) + 2 NaNO₃ (aq)
The molar mass of AgNO₃ is 170 g
The molar mass of Ag₂S is 246 g/mol
2 * 170 g of AgNO₃ produces 246 g of Ag₂S
7.79 g of AgNO₃ will produces7.79 * 246/240 = 7.98 g of Ag₂S precipitate.
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What is the freezing point depression of water in a solution of 17.1 g of sucrose?
The freezing point depression of of 17.1 grams of sucrose in 500.0 grams of water is −0.186°C.
A solution's freezing point is lower than that of the pure solvent's.
The term "freezing point depression" is used to describe this phenomena.
DT = (Kf) is the formula for the freezing point depression (m)
The freezing point depression is represented by T f = T° f - ΔT
The pure solvent's freezing point is T°f.
The solution's freezing point is ΔTf.
Kf is the solvent's molal freezing point depression constant.
The value of Kf is typical for the particular solvent.
Kf is measured in °C/m units.
The solution's molality is given by m.
m is the amount of solute per kilogram of solvent.
m = kilogram of solvent/moles of solute
The molecular weight of sucrose is
12(12.01) + 22(1.01) + 11(16.00) = 342.34 g/mole
The number of moles of Sucrose = 17.1 / 342.34 = 0.05moles
and the concentration of the solution in moles per kilogram of water is
0.05 moles / 0.500 kg H₂O = 0.1 molal
By taking the freezing point constant for water as 1.86
Δ T f = 1.86°C/m × 0.1 m
Δ T f = 0.186
Because the freezing point of pure water is 0°C, the sucrose solution freezes at –0.186°C.
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Complete Question -
What is the freezing point depression of of 17.1 grams of sucrose
(C12H22O11) in 500.0 grams of water?
One event in a high school track meet is the 400 meter run. If the runners of the 400
meter event start and end at the same location, what is their DISTANCE?
0 meters
© 200 meters
0 400 meters
800 meters
Answer:
400 meters
Explanation:
Distance is the amount traveled. It doesn't matter if the runners start and end in the same place for distance, they still travel 400 meters.
Automobiles and trucks pollute the air with NO. At 2000.0°C, Kc for the reaction At 2000.0°C Kc = 4.100 × 10–4 and ?H° = 180.6 kJ. What is the value of Kc at 39.00°C?
Automobiles and trucks pollute the air with NO. At 2000.0°C, Kc for the reaction At 2000.0°C Kc = 4.100 × 10–4 and H° = 180.6 kJ. 3.3396 * 10⁻³⁰ is the value of Kc at 39.00°C.
What is reaction ?When atoms establish or break chemical bonds, chemical processes take place. Reactants are the substances that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.
In a chemical reaction, reactants undergo a chemical reaction and transform into products through a chemical process. For instance, when humans breathe in oxygen, it combines with glucose to create carbon dioxide, water, and energy. The response is provided below. C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy.
ln ( K₂ / K1 ) = ( 1 / T1 - 1 / T₂)
K₂ is rate constant at temperture T₂
K₁ is rate constant at temperature T₁
K₁ = 4.100 × 10–4
T₂ = 321 K
ΔH = 180.6 kJ
R = 8.314 mole ⁻¹
Ln ( K₂ / 4.100 × 10–4 ) = 180.6 * 10 ³ / 8.314 ( 1 / 2273 - 1 / 312 )
= - 60.066
K₂ = 3.3396 * 10⁻³⁰
Thus, 3.3396 * 10⁻³⁰ is the value of Kc at 39.00°C.
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The Kc value for the reaction at 39 degree celsius can be determined using the Clausius - Clapeyron equation. The Kc value is obtained to be 2.3 × 10⁻⁴.
What is Clausius -Clapeyron equation ?The Clausius -Clapeyron equation is used find the reaction constant at two different temperatures using the expression written below:
[tex]\rm ln \frac{K _{2}}{K_{1}} =\frac{ H^{0} }{R} [\frac{1}{T_{1}} -\frac{1}{T_{2}} ][/tex]
Where, R is the universal gas constant, H be the enthalpy of the reaction.
Given that T1 = 39 °C
T2 = 2000 °C
H° = 180.6 kJ.
K2 = 4.1 × 10⁻⁴.
Then ln ( 4.1 × 10⁻⁴/ K1) = 180.6 kJ/ 8.314 J/°C [1/39 - 1/2000]
K1 = 2.3 × 10⁻⁴.
Therefore, the Kc value at a temperature of 39 degree Celsius is 2.3 × 10⁻⁴.
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What is the formula of ratio of speed?
The basic formula says: Speed= Distance/Time . From this formula, it is evident that speed is directly proportional to distance and inversely proportional to time.
What is speed?
In everyday use and kinematics, the velocity of an object (commonly denoted by v) is the rate of change of position over time, or the rate of change of position per unit time. Therefore it is a scalar quantity. Average velocity of an object within a time interval is the distance traveled by the object divided by the duration of the interval Instantaneous velocity is the limit of average velocity when the duration of the time interval approaches zero. Velocity is not the same as speed.
The basic formula says: Speed= Distance/Time . From this formula, it is evident that speed is directly proportional to distance and inversely proportional to time.
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Compare and interpret the infrared spectra of 4-methylcyclohexene and 4-methylcyclohexanol.
The IR spectrum of ethene is rather simple due to its simple structure.
How will you interpret the IR spectra of ethene?The interpretation of infrared spectra involves the connection of absorption bands in the spectrum of an unknown composite with the known absorption density for types of bonds,
The right-hand part of the infrared spectrum of ethane, wavenumbers ~1500 to 400 cm-1 is examined in the fingerprint region. This is a very neat tool for interpreting IR spectra.
So we can conclude that Interpretation of the infrared spectrum of ethene There are osmosis bands at ~1400 cm-1 due to scissoring H-C-H vibrations and ~3100 cm-1 from H-C-H
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For each item: classify organic or inorganic. NaCl: . phenol (C6H6;O): . C2H6: . Ca3(PO4)2: . formaldehyde (CH20): . MgCO3:
The correct classification of the following compounds are as follows:
NaCl: inorganic compoundPhenol (C₆H₆O): organic compoundC₂H₆: organic compoundCa₃(PO₄)₂: inorganic compoundFormaldehyde (CH₂0): organic compoundMgCO₃: inorganic compoundWhat are organic compound?Organic compound are any compound containing carbon atoms covalently bound to other atoms most commonly hydrogen, oxygen, or nitrogen.
Inorganic compounds are those not containing carbon atoms or containing carbon atoms ionically bound to other atoms.
However, not all carbon-containing compounds are organic. For example, carbon dioxide is an inorganic compound; although it has a carbon atom it has no C-C or C-H bonds.
Therefore, the classification of organic and inorganic compounds is as illustrated above.
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Sequence Determination of the Brain Peptide Leucine Enkephalin A group of peptides that influence nerve transmission in certain parts of the brain has been isolated from normal brain tissue. These peptides are known as opioids, because they bind to specific receptors that also bind opiate drugs, such as morphine and naloxone. Opioids thus mimic some of the properties of opiates. Some researchers consider these peptides to be the brain�s own pain killers. Using the information below, determine the amino acid sequence of the opioid leucine enkephalin. Explain how your structure is consistent with each piece of information.(a) Complete hydrolysis by 6 M HCl at 110 C followed by amino acid analysis indicated the presence of Gly, Leu,Phe, and Tyr, in a 2:1:1:1 molar ratio.(b) Treatment of the peptide with 1-fluoro-2,4-dinitrobenzene followed by complete hydrolysis and chromatography indicated the presence of the 2,4-dinitrophenyl derivative of tyrosine. No free tyrosine could be found.(c) Complete digestion of the peptide with chymopepsin followed by chromatography yielded free tyrosine and leucin plus a tripeptide containing Phe and Gly in a 1:2 ratio.
Option C) "are digested by proteases into both opiate and non-opiate peptides" is the correct response.
Like all other propeptides, the opioid propeptides is a protein precursor that must be cut into a smaller form to become active. Proteases convert the opioid propeptides into opiate and non-opiate peptides, the latter of which may or may not be active. Enkephalins, endorphins, and dynorphins, which are opiate peptides, work by blocking secondary systems, such as those that affect how pain is perceived.
The opioid receptors are essential signalling molecules in the brain that the leucine-enkephalin binds to. They include four peptide bonds in total. These are naturally occurring ligands that function as neurotransmitters and have morphine-like properties.
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What happens to pyruvate in the absence of oxygen?
Pyruvate undergoes fermentation, which transforms it into lactic acid inside the absence of oxygen.
The breakdown of the drug occurs throughout this process. similar to how pyruvate is converted into lactic acid.
An organic acid contains lactic acid. Its chemical formula is CH 3CH(OH)COOH.
It serves as a synthesis precursor inside a number of biochemical as well as molecular synthesis industries.
The final result of the glycolysis pathway, pyruvate, is transformed into lactic acid inside the lack of oxygen.
Glycolysis
The process through which glucose gets broken down to provide energy is known as glycolysis.
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Soil is a mixture of _______. A. Solidsb. Solids, liquids, and gasesc. Solids and liquidsd. Solids and gases please select the best answer from the choices providedabcd.
Answer: What is soil? In short, soil is a mixture of minerals, dead and living organisms (organic materials), air, and water.
Explanation:
Soil is a mixture of solids, liquids, and gases. Therefore, option B is correct.
What do you mean by soil ?Broken-down organic matter termed humus, living creatures, and broken-down rocks and minerals make up soil. Humus is nutrient-rich, squishy, and black.
Soil is a heterogeneous combination because it is made up of tiny fragments of various components. Water is an object. Water is a compound because it contains both hydrogen and oxygen. The substance oxygen is an element.
In addition to a porous phase that contains water and gases, soil consists of a solid phase made up of minerals and organic matter. The three states of soil are thus solids, liquids, and gases.
Thus, option B is correct.
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What is the substrate process?
A substrate in biology can be either a chemical that an enzyme can operate on or the surface that an organism (such as a plant, fungus, or animal) lives on. A substrate in geology is the surface of a rock or sediment where chemical and biological processes take place.
Geology describes it as the layer of rock or other elements that lies beneath the soil. For instance, a page is a substrate for ink to stick to, rock is a substrate for fungi, and NaCl is a substrate for a chemical reaction. The basic material on which processing is carried out is referred to as the substrate in the fields of materials science and engineering. This surface might be employed to create new films or material layers, like deposited coatings. It might serve as the foundation for the bonding of paint, adhesives, or sticky tape.
The substrate in biochemistry is a molecule that an enzyme reacts with. Chemical processes involving the substrate are catalyzed by enzymes (s). One or more products are created from the substrate, and they are then released from the active site. After that, another substrate molecule can be taken up by the active site.
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Classify each of the following proteins according to its function.
Part A
insulin, a hormone needed for glucose utilization
___
Part B
antibodies, proteins that disable foreign proteins
___
Part C
casein, milk protein
___
Part D
lipases that hydrolyze lipids
___
The classification of each protein is:
A. HormoneB. Immune System ProteinC. Structural ProteinD. EnzymeThe Importance of Proteins in Human HealthProteins are essential macromolecules for human health, playing a vital role in the functioning of the human body. From hormones and enzymes to structural proteins and antibodies, proteins are the building blocks of life and are involved in a wide range of biological processes. In this essay, the importance of proteins in human health will be discussed, focusing on their four main functions:
hormonesenzymesstructural proteinsantibodies.Hormones are proteins that regulate various physiological processes in the body. Insulin, for example, is a hormone that is essential for glucose utilization in the human body. Without insulin, glucose cannot be metabolized and utilized properly, leading to serious health issues such as diabetes.
Enzymes are proteins that catalyze biochemical reactions in the body. Lipases, for example, are enzymes that hydrolyze lipids, which are essential for the digestion of food. Without lipases, the body would not be able to properly digest and absorb the essential nutrients from food.
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Draw the major, neutral organic product obtained if: the reaction proceeds by the SN1 mechanism the reaction proceeds by the SN2 mechanism. Draw the major, neutral organic product for each substitution reaction below. (For this question, assume that each substitution reaction goes to completion. Disregard elimination.)
There are so many types of chemical reaction reaction like combination reaction, double displacement reaction, nucleophilic substitution reaction etc. Therefore, the product formed is 2-ethyl-butan-2-ol and 3 methyl- pentan-2-ol respectively.
What is nucleophilic substitution reaction?One nucleophile substitutes another in a family of organic reactions known as nucleophilic substitution reactions.
SN1 is a nucleophilic substitution reaction. Leaving group, a nucleophile, electrophile and a solvent are present. Two types of enantiomers can be formed in the reaction depending on the preference of the nucleophile. The first step is the slowest because a bond is being broken to form carbocation. The product is 2-ethyl-butan-2-ol. If attack is via SN2 then the product formed is 3 methyl- pentan-2-ol.
Therefore, the product formed is 2-ethyl-butan-2-ol and 3 methyl- pentan-2-ol respectively.
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to remove 99% of benzene (c6h6) from groundwater contaminated with 5 mg/l benzene using advanced oxidation. if the groundwater is pumped at 100 gallon per minute, how much benzene
After solving the equation benzene is 2.698 kg is the correct answer.
Description of the answer
1 day = 24 hrs = 24×60 minute = 1440 minutes
concentration of benzene in groundwater = 5 mg/l
100 gallon = 378.541 L
100 gallon/minute = 378.541 L/minute
100 gallon (378.541 l) benzene contaminated groundwater is being pumped per minute, therefore the volume of groundwater being pumped in one day (i.e. 1440 minutes) = (378.541 × 1440) l = 545099.04L
Since 1 l groundwater is contaminated with 5 mg benzene, therefore 545099.04 l groundwater is contaminated with = (545099.04 × 5) mg = 2725495.2 mg = 2725.495 g = 2.725 kg
Thus, 545099.04 l groundwater is pumped per day, which contains a total of 2.725 kg benzene as contamination.
Since 99% benzene from groundwater has to be removed, therefore benzene waste (kg) needed to be treated per day = (2.275 × 99 / 100) kg = 2.698 kg.
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Use bond enthalpies to estimate the enthalpy change for each of the following reactions.
H2C=O(g)+HCl(g)→H3C−O−Cl(g)
H2O2(g)+2CO(g)→H2(g)+2CO2(g)
3H2C=CH2(g)→C6H12(g)
The enthalpy changes for each of the following reactions are:
H2C=O(g)+HCl(g)→H3C−O−Cl(g) = 256kJH2O2(g)+2CO(g)→H2(g)+2CO2(g) = 636kJ3H2C=CH2(g)→C6H12(g) = -164kJThe difference between total reactant and total product molar enthalpies estimated for substances in their standard states is the standard enthalpy of reaction for a chemical process. The quantity of heat evolved or absorbed in a process under constant pressure is referred to as enthalpy change. It is assigned the symbol ΔH, interpreted as "delta H".
Enthalpy is the product of internal energy and pressure multiplied by volume. We can't measure a system's enthalpy, but we can look at variations in enthalpy. The sum of internal energy (U) and the product of pressure (P) and volume (V) equals enthalpy (H) (V). The system's heat added or lost is quantified as a change in enthalpy (H), not the actual amount of heat.
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