Chemistry - Chemical Kinetics Question with Solution | TestHub

The gaseous decomposition reaction, $\mathrm{A}(\mathrm{g})\to \mathrm{B}(\mathrm{g})+3\mathrm{C}(\mathrm{g})$ is observed to be first order over excess of liquid water at $27^{\circ }\mathrm{C}$. It is found that after 15 minutes the total pressure of the system is 349 torr and after a very long time it is 424 torr. The rate constant of the reaction (in ${\mathrm{hr}}^{-1}$) is:

[Given : vapour pressure of ${\mathrm{H}}_2\mathrm{O}$ at $27^{\circ }\mathrm{C}$ is 24 torr, ln 2 = 0.7]