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Chapter 12: Q62 E (page 709)

In terms of collision theory, to which of the following is the rate of a chemical reaction proportional?

(a) the change in free energy per second

(b) the change in temperature per second

(c) the number of collisions per second

(d) the number of product molecules

Short Answer

Expert verified

Option (c)the number of collisions per second

Step by step solution

01

Correct Option

The correct option is (c) the number of collisions per second.

02

Explanation

From the collision state theory, the reaction rate is directly proportional to the number of collisions occurring per second between two reactant molecules.

Therefore option (c) is correct.

The rate of a reaction is independent of the change in free energy per second or the number of product molecules formed

The rate of a reaction is directly proportional to temperature, but there is no dependency on the rate of increase of temperature on the rate of reaction.

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Most popular questions from this chapter

Nitro-glycerine is an extremely sensitive explosive. In a series of carefully controlled experiments, samples of the explosive were heated to 160 掳C, and their first-order decomposition was studied. Determine the average rate constants for each experiment using the following data:

Initial (\({{\bf{C}}_{\bf{3}}}{{\bf{H}}_{\bf{5}}}{{\bf{N}}_{\bf{3}}}{{\bf{O}}_{\bf{9}}}\)) (M)

4.88

3.52

2.29

1.81

5.33

4.05

2.95

1.72

t(s)

300

300

300

300

180

180

180

180

% Decomposed

52.0

52.9

53.2

53.9

34.6

35.9

36.0

35.4

The rate constant at 325掳C for the decomposition reaction \({{\bf{C}}_{\bf{4}}}{{\bf{H}}_{\bf{8}}} \to {\bf{2}}{{\bf{C}}_{\bf{2}}}{{\bf{H}}_{\bf{4}}}\)is 6.1 脳 10鈭�8 s鈭�1, and the activation energy is 261 kJ per mole of\({{\bf{C}}_{\bf{4}}}{{\bf{H}}_{\bf{8}}}\). Determine the frequency factor for the reaction.

Use the PhET Reactions & Rates interactive simulation to simulate a system. On the 鈥淪ingle collision鈥� tab of the simulation applet, enable the 鈥淓nergy view鈥� by clicking the 鈥�+鈥� icon. Select the first A + BC鉄禔B + C reaction (A is yellow, B is purple, and C is navy blue). Using the 鈥渟traight shot鈥� default option, try launching the A atom with varying amounts of energy. What changes when the Total Energy line at launch is below the transition state of the Potential Energy line? Why? What happens when it is above the transition state? Why?

When every collision between reactants leads to a reaction, what determines the rate at which the reaction occurs?

For each of the following pairs of reaction diagrams, identify which of the pair iscatalyzed:
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