1 mole of an ideal gas $\mathrm{A}\left({\mathrm{C}}_{\mathrm{v},\mathrm{m}}=3\mathrm{R}\right)$ and 2 mole of an ideal B are $\left({\mathrm{C}}_{\mathrm{v},\mathrm{m}}=\frac{3}{2}\mathrm{R}\right)$, taken in a container and expanded reversible and adiabatically from 1 litre to 4 litre starting from initial temperature of 320K. $\mathrm{\Delta E} \mathrm{or} \mathrm{\Delta U}$ for the process is