Question

The concentration of R in the reaction R $\to$ P was measured as a function of time and the following data is obtained.

$\begin{array}{ccccc}\text{[R] (molar)}& \text{1.0}& \text{0.75}& \text{0.40}& \text{0.10}\\ \text{t (min)}& \text{0.0}& \text{0.05}& \text{0.12}& \text{0.18}\end{array}$

The order of the reaction is ___

Answer 1

The rate is 5 mol/l min throughout. Since the rate of reaction is constant with time, the order of the reaction is zero.