Acetaldehyde $(C_2{H}_{2}O)$ is produced by following reaction

$C_2{H}_4(g)+\frac{1}{2}{O}_2(g)C_2{H}_{4}O(8)$

The feed to a reactor contains $100mo\frac{l}{S_2}{C}_2{H}_4$ and equimolar amount of $O_2$ at $50C$ and $1$atm pressure. The conversion of $C_2{H}_4$ in the reactor is respectively $25\%.$ The reactor worts adiabatically. All species leaving the reactor are at $1$atm pressure calculate the temperature of the outlet stream leaving the reactor.