Question

Work done by the system in a cyclic process is equal to:

• A. zero
• B. $\Delta U$
• C. $\Delta H$
• D. $-q$

Answer 1

The correct option is D $-q$

$\Delta U$ is a state function, means the value doesn't depend on the path taken to reach that specific value. It only depends on final and initial values. For cyclic process, the value of $\Delta U=0$
Also we know
$\Delta U-W=q.$
If cyclic process, then $q=-W.$
$W=-q$