Question

During adiabatic compression of a gas, its temperature.

• A. Falls
• B. Rises
• C. Remains constant
• D. Becomes zero

Answer 1

Answer: (B)

Rises

Using $\Delta Q=\Delta W+\Delta U$
For adiabatic process $\Delta Q=0$
$⟹\Delta U=-\Delta W$
Since, work done in compressing a gas is negative, thus $\Delta U>0$
No heat goes out, the work done on the system increases the internal energy, hence temperature of the gas increases.