(a) 708

(b) 354

(c) 0.0014

(d) 26.6

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Given: The rate of the elementary reaction $H_2(g) + I_2(g) \rightleftharpoons 2HI(g)$ at $25^\circ C$ is given by: Rate = $1.7 \times 10^{-18} [H_2] [I_2]$ . The rate of decomposition of gaseous HI to $H_2(g)$ and $I_2(g)$ at $25^\circ C$ is Rate = $2.4 \times 10^{-21} [HI]^2$.

(a) 708

(b) 354

(c) 0.0014

(d) 26.6

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- For a reversible reaction, at equilibrium, Rate of Forward reaction = Rate of Backward reaction
- Rate of a reaction = Equilibrium Constant $\times$ Product of Concentration of reactants or products

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