JEE Main202310 Apr 2023Evening ShiftPhysicsThermodynamicsActual
A gas is compressed adiabatically, which one of the following statement is NOT true?
Options
- AThere is no heat supplied to the system
- BThere is no change in the internal energy
- CThe temperature of the gas increases
- DThe change in the internal energy is equal to the work done on the gas
Correct answer
B. There is no change in the internal energy
Step-by-step solution
In adiabatic process, ∆ Q = 0 and ∆ U ≠ 0 Using the first law of thermodynamics, ∆ Q = ∆ U + W ⇒ ∆ U = - W   W   is the work done by the gas ,   so   - W   will be the work done on the gas As the gas is compressed W   < 0 Therefore, ∆ U   > 0 and hence ∆ T   > 0 .