Q. 95 A rigid closed tank contains $2 \mathrm{~kg}$ of an ideal gas at $500 \mathrm{kPa}$ and $350 \mathrm{~K}$. A valve is opened, and half of the mass of the gas is allowed to escape. Then the valve is closed. If the final pressure in the tank is $300 \mathrm{kPa}$, the final temperature in the tank is $\mathrm{K}$ (in integer).
