Final answer:
The rate law for the reaction H2 + Br2 → 2HBr needs to be determined experimentally and cannot be simply inferred from the stoichiometry of the balanced equation.
Step-by-step explanation:
The rate law for the reaction H₂ + Br₂ → 2HBr can be determined experimentally and cannot be simply inferred from the stoichiometry of the balanced equation. In general, the rate law expression takes the form rate = k[A]m[B]n, where k is the rate constant, A and B are the concentrations of the reactants, and m and n are the orders of the reaction with respect to each reactant. To write the rate law for this specific reaction, one would need to perform experiments to determine the reaction order with respect to each reactant.
Based on the provided information about a related reaction, 2IC1 (1) + H₂(g) → 2 HCl(g) + I₂ (s), where the rate was experimentally determined to be rate = k[IC1][H₂], we can hypothesize a similar form for the H₂ + Br₂ reaction if it follows an analogous mechanism. However, since the question is about the reaction between hydrogen and bromine, we need its specific experimental data to establish the correct rate law.