The sum of i$)$ work done on$/$by the system $($w$)$ and ii$)$ the heat exchanged $($q$)$ between the system and surroundings is equal to:

H

$E_{\text{i}\text{n}\text{t}}$

$E_{\text{i}\text{n}\text{t}}+PV$

$E_{\text{i}\text{n}\text{t}}$