Question

Select all that apply. The rate law for the reaction 2NO(g) + CU(g) rightarrow 2NOCl(g) is given by R = k[NO][Cl2] If the following is the mechanism for the reaction, NO(g) + Cl2(g) rightarrow NOCl2(g) NOCl2(g) + NO(g) rightarrow 2NOCl(g) which of the following statements accurately describes this reaction? Check all that apply. a. 2nd order reaction b. The first step is the slow step. c. Doubling [NO] would quadruple the rate. d. Cutting [Cl2] in half would decrease the rate by a factor of two. e. The molecularity of the first step is 1. f. Both steps are termolecular.

Answer 1

Answer:

a. 2nd order reaction.  

b. The first step is the slow step.  

Explanation:

r = k[NO][Cl₂]

a. The reaction is first-order in [NO] and first-order in [Cl₂], so it is second-order overall.

b. The first step is the slow step, because it predicts the correct rate law.

c. is wrong. Doubling [NO] would double the rate, because the reaction is first-order in [NO].

d. is wrong. Cutting [Cl₂] in half would halve the rate, because the reaction is first-order in [Cl₂].

e. is wrong. The molecularity is two, because two particles are colliding.

f. is wrong. Both steps are bimolecular.