$1$ Given the same reactant concentrations, the reaction $C{O}_{(g)}+C{l}_{2(g)}COC{l}_{2(g)}$ at $250C$ is $1\mathrm{.}50{10}^3$ times as fast as the same reaction at $150C.$

$($a$.)$ Calculate the activation energy for this reaction.

$($b$.)$ What is the value of $k$ when the temperature is $100C?$

Solvent step by step specially $($b$)$ The a solve in lnk$1/$lnk$2=($Ea$/$r $)*(1/$t$2)\_(1/$t$1)$