Question A$1[15$ Marks$]$

A$1.$a A simplified chemical process for manufacturing product $C$ from A and $B$ is shown below $($D is the side product$)$ together with their standard enthalpy values $H$ at $298K.$ Determine if the process is exothermic or endothermic when being operated at steadystate. You may assume that all streams entering and leaving the process are at $T=298K$ and $P=1$ bar.