A thermodynamical system is changed from state $\left(\mathrm{P}_{1}, \mathrm{~V}_{1}\right)$ to…
A thermodynamical system is changed from state $\left(\mathrm{P}_{1}, \mathrm{~V}_{1}\right)$ to $\left(\mathrm{P}_{2}, \mathrm{~V}_{2}\right)$ by two different process, the quantity which will remain same will be
$\Delta \mathrm{Q}$
$\Delta \mathrm{W}$
$\Delta \mathrm{Q}+\Delta \mathrm{W}$
$\Delta \mathrm{Q}-\Delta \mathrm{W}$
Solution
For all process $\Delta \mathrm{U}=\Delta \mathrm{Q}-\Delta \mathrm{W}$ does not change as it depends on initial final states.