Question

The decomposition of a compound A follows first-order kinetics. The concentration of A at time t = 0 is 1.0 mol L^-1. After 60 minutes, it reduces to 0.25 mol L^-1. What is the initial rate of the reaction at t = 0? (Take ln 2 = 0.693)

• A. 0.0115 mol L$^{-1}$ min$^{-1}$
• B. 0.0173 mol L$^{-1}$ min$^{-1}$
• C. 0.277 mol L$^{-1}$ min$^{-1}$
• D. 0.0364 mol L$^{-1}$ min$^{-1}$

Hint:

For first-order reactions, use the integrated rate law to calculate the rate constant and then determine the rate of the reaction.