Question

what is the overall order of the following reaction, given the rate law?
2no(g) + h₂(g) → n₂(g) + 2h₂o(g) rate = kno²h₂
a) 1st order
b) 2nd order
c) 3rd order
d) 4th order
e) 0th order

Explanation:

Step1: Recall the formula for reaction order

The overall order of a reaction is the sum of the exponents in the rate law.

Step2: Identify the exponents

In the rate law \( Rate = k[NO]^2[H_2] \), the exponent of \( [NO] \) is \( 2 \) and the exponent of \( [H_2] \) is \( 1 \).

Step3: Calculate the overall order

Add the exponents: \( 2 + 1=3 \)

Answer:

C. 3rd order