Question

The rate of the reaction, 2A+B gives products is given by rate expression, rate = k(A)^1.5 (B)^0.5. If (A) is 2molar and (B) is 100molar, then the order of reaction will be?

Answer 1

Answer:

1.5

Explanation:

[B]^0.5 = √100 = 10

so rate is of zero order with respect to B

thus only [A]^1.5 i.e. (2)^1.5 is considered and order of reaction is taken as 1.5

Answer 2

The order of reaction will be two.

Explanation:

• The order of any chemical reaction is the sum of the powers of the concentration terms in the rate law. It is an experimentally determined quantity and does not depend on the concentrations of the reactants involved.

For the given reaction $2A + B \rightarrow Product$

• The rate law is $rate = k[A]^{1.5} [B]^{0.5}$

Thus, the order of the reaction = 1.5 + 0.5 = 2

• The reaction will remain in second-order irrespective of the concentrations.