Chapter 15, Problem 87E

At 700 K acetaldehyde decomposes in the gas phase to methane and carbon monoxide. The reaction is:
${\text{CH}}_{\text{3}}\text{CHO}\left(\text{g}\right)\to {\text{CH}}_{\text{4}}\left(\text{g}\right)+\text{CO}\left(\text{g}\right)$
A sample of ${\text{CH}}_{\text{3}}\text{CHO}$ is heated to 700 K, and the pressure is measured as 0.22 atm before any reaction takes place. The kinetics of the reaction are followed by measurements of total pressure, and these data are obtained:

t(s)	0	1000	3000	7000
PTotal(atm)	0.22	0.24	0.27	0.31

Determine the rate law, the rate constant and the total pressure after $\text{2}.00\times \text{1}{0}^{\text{4}}\text{s}$ .