Three hundred $\frac{L}{h}$ of a $20\mathrm{.}0$ mole $\%C_3{H}_8-80\mathrm{.}0\%n-C_4{H}_{10}$ mixture at $0C$ and $1\mathrm{.}10$atm and $200\mathrm{.}0\frac{L}{h}$ of a $40\mathrm{.}0$mole$\%C_3{H}_8-60\mathrm{.}0\%n-$

$C_4{H}_{10}$ mixture at $25C$ and $1\mathrm{.}10$ atm are mixed and heated to $227C$ at constant pressure.

Enthalpies of propane and $n-$butane are listed below. Assume ideal$-$gas behavior.

Calculate the heat requirement.

$k\frac{J}{h}$