When an ideal gas at pressure, , temperature, and volume, , is isothermally compressed to , its pres — Thermodynamics and Thermochemistry Chemistry Question

Question

When an ideal gas at pressure, $P$, temperature, $T$ and volume, $V$, is isothermally compressed to $V/n$, its pressure becomes $P_i$. If the gas is compressed adiabatically to $V/n$, its pressure becomes $P_a$. The ratio of $P_i / P_a$ is