At 700 K, acetaldehyde decomposes in the gas phase to methane and carbon monoxide. The reaction is: CH₃CHO(g)¡CH₄(g) + CO(g)

A sample of CH₃CHO 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:

Find the rate law, the rate constant, and the total pressure after 2.00 * 10⁴ s.

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