Question

analyzing a specific reaction
consider the following reaction:
h₂ + 2icl→i₂ + 2hcl,
rate = kh₂icl

part a
what is the overall reaction order?
express your answer as an integer.
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Explanation:

Step1: Recall reaction - order formula

The rate law is given as rate = $k[\text{H}_2][\text{ICl}]$. The reaction - order with respect to a reactant is the exponent of its concentration in the rate - law expression. Here, the exponent of $[\text{H}_2]$ is 1 and the exponent of $[\text{ICl}]$ is 1.

Step2: Calculate overall reaction order

The overall reaction order is the sum of the reaction - orders with respect to each reactant. So, overall order = 1 (order with respect to $\text{H}_2$)+ 1 (order with respect to $\text{ICl}$) = 2.

Answer:

2