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For the reaction 2H2(g) + 2NO(g) → N2(g) + 2H2O(g) the observed rate expression is, rate = k[NO]^2[H2]. The rate expression for the reverse reaction is :
- k_b[N2][H2O]^2/[H2]
- k_b[N2][H2O]
- k_b[N2][H2O]^2/[NO]
- k_b[N2][H2]^2[O2]
Correct answer: k_b[N2][H2O]
Solution
The rate expression for the reverse reaction is derived from the stoichiometry of the products and reactants, where the rate depends on the concentrations of the products N2 and H2O. Since the reverse reaction involves the formation of these products, the correct expression reflects their concentrations without any additional factors from the reactants.
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