Thermodynamics (Physics) · Question 30

The work done in an adiabatic change in an ideal gas depends upon only :

1. change in its pressure
2. change in its temperature
3. change in its specific heat
4. change in its volume

Answer

(2) change in its temperature

Solution

For an adiabatic process, Q = 0

First law: Q = U + W W = - U

For an ideal gas, U = nCv T

W = -nCv T = nR(T1 - T2) - 1

For a given gas, the work done depends only on the change in its temperature.

Answer: (2)