Question

the heat combustion of carbon monoxide at constant volume and at 17°c is -283.3kj. calculate its heat of combustion at constant pressure (R= 8.314jk-¹mol-³)

Answer 1

heat of comustion at constant pressure=nC$_p$ $\delta T$

heat of comustion at constant volume=nc$_v$ $\delta T$

divide both above equation and we get

$\tfrac{heat at constant pressure}{heat at constant volume}$ = $\tfrac{C_p}{C_v}$

we know that

$\tfrac{C_P}{C_v}=R\\ heat at constant pressure=-283.3*8.31$

=-2354.22kj