The reaction 2A + B → C + D is studied to determine the kinetics of the reaction at a certain temperature, which is held constant throughout the experiment.

a. Find the order with respect to A and B and explain your reasoning.
b. Write the rate law that is consistent with part (a).
c. Determine the value for k and specify its units.

The reaction 2A B C D is studied to determine the kinetics of the reaction at a certain temperature which is held constant throughout the experiment a Find the class=

Respuesta :

The rate of reaction refers to how quickly or solwly a reaction occurs;

a) Both A and B are second order

b) The rate law of the reaction is R = k[A]^2 [B]^2

c)The rate constant is  5.21 * 10^5 mol-3L^3s-1.

What is the rate of reaction?

The term rate of reaction refers to how quickly or slowly a reaction occurs.

a) To obtain the order with respect to A, we divide reaction (3) by (2) as follows;

5.01 * 10^-1/1.25 * 10^-1 = k[0.0070]^m [0.14]^n/k[0.0035]^m [0.14]^n

4 = 2^m

2^2 = 2^m

m =2

To obtain the order with respect to B, we divide reaction (2) by (1);

1.25 * 10^-1/3.13 * 10^-2 = k[0.0035]^m [0.014]^n/k[0.0035]^m [0.0070]^n

4 = 2^n

2^2 = 2^n

n = 2

b)The reaction is second order in both A and B hence the rate law is R = k[A]^2 [B]^2

c) We can obtain K using any of the reactions;

0.0313 molL-1s-1 = k[0.0035molL-1]^2 [0.0700molL-1]^2

k = 0.0313 molL-1s-1/[0.0035molL-1]^2 [0.0700molL-1]^2

k = 5.21 * 10^5 mol-3L^3s-1

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