Ch.14 - Chemical Kinetics
Chapter 14, Problem 87
Two reactions have the same activation energy, but their rates at the same temperature differ by a factor of 10. Explain.
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Related Practice
Textbook Question
Consider the following concentration–time data for the decomposition reaction AB → A + B.
(b) What is the molarity of AB after a reaction time of 192 min?
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Textbook Question
Trans-cycloheptene 1C7H122, a strained cyclic hydrocarbon,
converts to cis-cycloheptene at low temperatures. This
molecular rearrangement is a second-order process with a
rate constant of 0.030 M-1 s-1 at 60 °C. If the initial concentration
of trans-cycloheptene is 0.035 M:
(c) What is the half-life of trans-cycloheptene at an initial
concentration of 0.075 M?
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Textbook Question
Why don't all collisions between reactant molecules lead to
a chemical reaction?
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Textbook Question
When the temperature of a gas is raised by 10 °C, the collision
frequency increases by only about 2%, but the reaction
rate increases by 100% (a factor of 2) or more. Explain.
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Textbook Question
What fraction of the molecules in a gas at 300 K collide with an
energy equal to or greater than Ea when Ea equals 50 kJ/mol?
What is the value of this fraction when Ea is 100 kJ/mol?
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Textbook Question
The values of Ea = 248 kJ>mol and ΔE = 41 kJ>mol have
been measured for the reaction
H21g2 + CO21g2S H2O1g2 + CO1g2
(b) Considering the geometry of the reactants and products,
suggest a plausible structure for the transition state.
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