Write the rate law for the following elementary reaction: H2(g) 2I(g) (g) Use to stand for the rate constant.

rate = k ×[H₂] × [I]²

Explanation:

Write the rate law for the following elementary reaction: H₂(g) + 2 I(g) → 2 HI(g) Use k, to stand for the rate constant.

Step 1: Write the elementary reaction

H₂(g) + 2 I(g) → 2 HI(g)

Step 2: Write the rate law

The generic rate law is

rate = k ×[H₂]ᵃ × [I]ᵇ

where,

rate: reaction rate

k: rate constant

[H₂] and [I]: molar concentrations of the reactants

a and b: reaction orders for H₂ and I, respectively

For elementary reactions, the reaction orders coincide with the stoichiometric coefficients. Then, the rate law is:

rate = k ×[H₂] × [I]²

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