Question 51 of 190

An engine takes in $5$ moles of air at $20^{\circ}C$ and $1atm$, and compresses it adiabatically to $1/{10}^{th}$ of the original volume. Assuming air to be a diatomic ideal gas made up of rigid molecules, the change in its internal energy during this process comes out to be $XkJ$. The value of $X$ to the nearest integer is: