Question

Half life period for first order reaction is 10 sec. Calculate the rate constant for the reaction.

Answer 1

The relationship between the rate constant $k$ and the half life period $t_{1/2}$ is
$k=\frac{0.693}{t_{1/2}}$.
The half life period is 10 sec. The rate constant is $k=\frac{0.693}{10}=0.0693/s$