2 mole of an ideal mono atomic gas undergoes a reversible process for which ${\text{PV}}^{\text{2}}\text{\hspace{0.17em}=\hspace{0.17em}C}$. The gas

is expanded from initial volume of 1 L to a final volume of 3 L starting from initial temperature of  300 K. find $\Delta \text{H}$ for the process