Chemistry & Chemical Reactivity
10th Edition
ISBN: 9781337399074
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Chapter 14.7, Problem 1.2ACP
Interpretation Introduction
Interpretation: The moles of enzyme and mass of carbon di-oxide has to be given.
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An uncatalyzed reaction has an equilibrium constant, Keq, of 50. In the presence of an appropriate enzyme, the forward rate of the reaction increased by 20-fold. What is the equilibrium constant in the presence of the enzyme?
When an enzyme is added to a solution (1.0 mL) containing its substrate at a concentration of 100 times the Km, it catalyzes the conversion of 75 mol of the substrate into the product in 3.0 min in the 1.0 mL solution. The concentration of enzyme in the solution is 0.20 M. What is the enzyme's turnover number (kcat)? Note that the unit of kcat is min-1.
Explain enzyme kinetics including zero-order and first-order kinetics.
Chapter 14 Solutions
Chemistry & Chemical Reactivity
Ch. 14.1 - Sucrose decomposes to fructose and glucose in acid...Ch. 14.1 - What are the relative rates of appearance or...Ch. 14.3 - The initial rate ( [NO]/ t] of the reaction of...Ch. 14.3 - The rate constant, k, at 25 C is 0.27/h for the...Ch. 14.4 - Sucrose, a sugar, decomposes in acid solution to...Ch. 14.4 - Gaseous azomethane (CH3N2CH3) decomposes to ethane...Ch. 14.4 - Prob. 14.7CYUCh. 14.4 - The catalyzed decomposition of hydrogen peroxide...Ch. 14.4 - Americium is used in smoke detectors and in...Ch. 14.5 - Prob. 14.10CYU
Ch. 14.5 - The colorless gas N2O4, decomposes to the brown...Ch. 14.7 - Nitrogen monoxide is reduced by hydrogen to give...Ch. 14.7 - Prob. 14.13CYUCh. 14.7 - One possible mechanism for the decomposition of...Ch. 14.7 - Prob. 1.1ACPCh. 14.7 - Prob. 1.2ACPCh. 14.7 - Prob. 2.1ACPCh. 14.7 - Prob. 2.2ACPCh. 14.7 - Prob. 2.3ACPCh. 14.7 - Determine the activation energy for the reaction...Ch. 14 - Give the relative rates of disappearance of...Ch. 14 - Give the relative rates of disappearance of...Ch. 14 - In the reaction 2 O3(g) 3 O2(g), the rate of...Ch. 14 - In the synthesis of ammonia, if [H2]/t = 4.5 104...Ch. 14 - Experimental data are listed here for the reaction...Ch. 14 - Phenyl acetate, an ester, reacts with water...Ch. 14 - Using the rate equation Rate = k[A]2[B], define...Ch. 14 - A reaction has the experimental rate equation Rate...Ch. 14 - The reaction between ozone and nitrogen dioxide at...Ch. 14 - Nitrosyl bromide, NOBr, is formed from NO and Br2:...Ch. 14 - The data in the table are for the reaction of NO...Ch. 14 - The reaction 2 NO(g) + 2 H2(g) N2(g) + 2 H2O(g)...Ch. 14 - Data for the reaction NO(g) + O2(g) NO2(g) are...Ch. 14 - Data for the following reaction are given in the...Ch. 14 - The rate equation for the hydrolysis of sucrose to...Ch. 14 - The decomposition of N2O5 in CCl4 is a first-order...Ch. 14 - The decomposition of SO2Cl2 is a first-order...Ch. 14 - The conversion of cyclopropane to propene (Example...Ch. 14 - Hydrogen peroxide, H2O2(aq), decomposes to H2O()...Ch. 14 - The decomposition of nitrogen dioxide at a high...Ch. 14 - At 573 K, gaseous NO2(g) decomposes, forming NO(g)...Ch. 14 - The dimerization of butadiene, C4H6, to form...Ch. 14 - The decomposition of ammonia on a metal surface to...Ch. 14 - Hydrogen iodide decomposes when heated, forming...Ch. 14 - The rate equation for the decomposition of N2O5...Ch. 14 - Gaseous azomethane, CH3N=NCH3, decomposes in a...Ch. 14 - The decomposition of SO2Cl2 SO2Cl2(g) SO2(g) +...Ch. 14 - The compound Xe(CF3)2 decomposes in a first-order...Ch. 14 - The radioactive isotope 64Cu is used in the form...Ch. 14 - Radioactive gold-198 is used in the diagnosis of...Ch. 14 - Prob. 31PSCh. 14 - Ammonia decomposes when heated according to the...Ch. 14 - Gaseous NO2 decomposes at 573 K. NO2(g) NO(g) + ...Ch. 14 - The decomposition of HOF occurs at 25 C. HOF(g) ...Ch. 14 - Prob. 35PSCh. 14 - Prob. 36PSCh. 14 - Calculate the activation energy, Ea, for the...Ch. 14 - If the rate constant for a reaction triples when...Ch. 14 - When healed lo a high temperature, cyclobutane,...Ch. 14 - When heated, cyclopropane is converted to propene...Ch. 14 - The reaction of H2 molecules with F atoms H2(g) +...Ch. 14 - Prob. 42PSCh. 14 - Compare the lock-and-key and induced-fit models...Ch. 14 - Prob. 44PSCh. 14 - Prob. 45PSCh. 14 - The enzyme carbonic anhydrase catalyzes the...Ch. 14 - What is the rate law for each of the following...Ch. 14 - What is the rate law for each of the following...Ch. 14 - Ozone, O3, in the Earths upper atmosphere...Ch. 14 - The reaction of NO2(g) and CO(g) is thought to...Ch. 14 - A proposed mechanism for the reaction of NO2 and...Ch. 14 - The mechanism for the reaction of CH3OH and HBr is...Ch. 14 - A reaction has the following experimental rate...Ch. 14 - For a first-order reaction, what fraction of...Ch. 14 - Prob. 55GQCh. 14 - Data for the following reaction are given in the...Ch. 14 - Formic acid decomposes at 550 C according to the...Ch. 14 - Isomerization of CH3NC occurs slowly when CH3NC is...Ch. 14 - When heated, tetrafluoroethylene dimerizes to form...Ch. 14 - Data in the table were collected at 540 K for the...Ch. 14 - Ammonium cyanate, NH4NCO, rearranges in water to...Ch. 14 - Prob. 62GQCh. 14 - At temperatures below 500 K, the reaction between...Ch. 14 - Nitryl fluoride can be made by treating nitrogen...Ch. 14 - The decomposition of dinitrogen pentaoxide N2O5(g)...Ch. 14 - The data in the table give the temperature...Ch. 14 - The decomposition of gaseous dimethyl ether at...Ch. 14 - The decomposition of phosphine, PH3, proceeds...Ch. 14 - The thermal decomposition of diacetylene, C4H2,...Ch. 14 - Prob. 70GQCh. 14 - The ozone in the Earths ozone layer decomposes...Ch. 14 - Hundreds of different reactions occur in the...Ch. 14 - Data for the reaction [Mn(CO)5(CH3CN)]+ + NC5H5 ...Ch. 14 - The gas-phase reaction 2 N2O5(g) 4 NO2(g) + O2(g)...Ch. 14 - Prob. 75GQCh. 14 - The decomposition of SO2Cl2 to SO2 and Cl2 is...Ch. 14 - The decomposition of nitrogen dioxide at a high...Ch. 14 - Prob. 78GQCh. 14 - Egg protein albumin is precipitated when an egg is...Ch. 14 - A The compound 1,3-butadiene (C4H6) forms...Ch. 14 - Hypofluorous acid, HOF, is very unstable,...Ch. 14 - We know that the decomposition of SO2Cl2 is...Ch. 14 - Nitramide, NO2NH2, decomposes slowly in aqueous...Ch. 14 - Prob. 84GQCh. 14 - The color change accompanying the reaction of...Ch. 14 - Prob. 87ILCh. 14 - Prob. 88ILCh. 14 - The oxidation of iodide ion by the hypochlorite...Ch. 14 - The acid-catalyzed iodination of acetone...Ch. 14 - Prob. 91SCQCh. 14 - The following statements relate to the reaction...Ch. 14 - Chlorine atoms contribute to the destruction of...Ch. 14 - Prob. 95SCQCh. 14 - Prob. 96SCQCh. 14 - The reaction cyclopropane propene occurs on a...Ch. 14 - Prob. 98SCQCh. 14 - Examine the reaction coordinate diagram given...Ch. 14 - Draw a reaction coordinate diagram for an...Ch. 14 - Consider the reaction of ozone and nitrogen...
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- Describe the difference between graphs showing temperature versus reaction rate for an enzyme-catalyzed reaction and an uncatalyzed reaction.arrow_forwardCompare the lock-and-key and induced-fit models for substrate binding to an enzyme.arrow_forwardWhy are enzymes important? For example, what is the importance of the enzyme carbonic anhydrase in the body?arrow_forward
- By which of the following mechanisms does a catalyst operate? a. It decreases the activation energy barrier for a reaction. b. It serves as a reactant and is consumed. c. It increases the temperature of a reaction. d. It increases the concentration of reactants.arrow_forwardAn uncatalyzed metabolic reaction has a rate constant of 2.7 x 10-4 M-¹ min-¹ at 310 K. In the presence of the enzyme that catalyzes the reaction the rate constant is 3.4 x 104 M-¹ min-¹ at the same temperature. If the activation energy of the uncatalyzed reaction is 93 kJ/mol, what is the activation energy of the catalyzed reaction? 48 kJ/mol none of the answers are correct 35 kJ/mol 45 kJ/molarrow_forwardThe image at right shows which of the following aspects of enzymatic catalysis? the lock and key model of catalysis the induced fit model of catalysis allosteric activation of the enzyme the formation of the catalytically competent ES complex a favorable interaction of the substrate with the enzyme active site Substrate Enzyme E-S complexarrow_forward
- Number 4 on the Reaction Energy diagram below represents Ep (kJ) reactants Reaction Coordinate products Is the activation energy for the uncatalyzed reaction. Is the activation energy for the enzyme catalyzed reaction. the energy produced by the reaction. The energy required for the reaction to proceed.arrow_forwardWhat is the difference between a catalyst and an enzyme?arrow_forwardSuppose that, in the absence of a catalyst, a certain biochemical reaction occurs x times per second at normal body temperature 137 °C2. In order to be physiologically useful, the reaction needs to occur 5000 times faster than when it is uncatalyzed. By how many kJ>mol must an enzyme lower the activation energy of the reaction to make it useful?arrow_forward
- Heat energy and collision of molecules are sometimes not enough to supply the activation energy needed by a reaction. The chemical reaction never happens. Explain how an enzyme can be used to cause the reaction to begin.arrow_forwardSuppose that a certain biologically important reaction is quite slow at physiological temperature (37 ∘C) in the absence of a catalyst. Assuming that the collision factor remains the same, by how much must an enzyme lower the activation energy of the reaction in order to achieve a 5×105-fold increase in the reaction rate?arrow_forwardEnzymes are biomolecules involve in chemical reactions. Explain how an enzyme affects the reaction rate of a chemical reaction. Discuss the factors affecting the ability of an enzyme to affect the reaction rate.arrow_forward
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