In an adiabatic compression, the temperature of an ideal gas rises and the average kinetic energy of the molecules also increases. Why is the kinetic energy increasing?

Question

In an adiabatic compression, the temperature of an ideal gas rises and the average kinetic energy of the molecules also increases. Why is the kinetic energy increasing? (A) because of collisions with moving part of the wall only. (B) because of collisions with the entire wall. (C) because the molecules gets accelerated in their motion inside the volume. (D) because the redistribution of energy amongst the molecules.

Tardigrade Admin · Accepted Answer

If an ideal gas is compressed adiabatically, its temperature rises, because heat produced cannot be lost to be the surroundings. Each molecule has more has more KE then before of collisions of molecules with moving parts of the wall ( i.e. piston compressing the gas).

Q. In an adiabatic compression, the temperature of an ideal gas rises and the average kinetic energy of the molecules also increases. Why is the kinetic energy increasing?

because of collisions with moving part of the wall only.

because of collisions with the entire wall.

because the molecules gets accelerated in their motion inside the volume.

because the redistribution of energy amongst the molecules.

If an ideal gas is compressed adiabatically, its temperature rises, because heat produced cannot be lost to be the surroundings. Each molecule has more has more $K E$ then before of collisions of molecules with moving parts of the wall ( $i . e .$ piston compressing the gas).