1. Tardigrade
  2. Question
  3. Chemistry
  4. Assertion: During an adiabatic process, heat energy is not exchanged between system and its surroundings. Reason: The temperature of a gas increases when it undergoes an adiabatic expansion.

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Assertion : During an adiabatic process, heat energy is not exchanged between system and its surroundings.
Reason : The temperature of a gas increases when it undergoes an adiabatic expansion.

AIIMSAIIMS 2002Thermodynamics

Solution:

In adiabatic process, no heat enters or leaves the system. The system is completely insulated from its surroundings. From first law of thermodynamics, change in internal energy,

$\Delta E = q - W = 0 - W = -W $.

Since the work is done at the expense of internal energy, therefore internal energy of the system decreases and hence temperature of the gas falls.