JEE Main20238 Apr 2023Morning ShiftPhysicsThermodynamicsActual
Given below are two statements: Statement I: If heat is added to a system, its temperature must increase. Statement II: If positive work is done by a system in a thermodynamic process, its volume must increase. In the light of the above statements, choose the correct answer from the options given below
Options
- AStatement I is true but Statement II is false
- BBoth Statement I and Statement II are false
- CBoth Statement I and Statement II are true
- DStatement I is false but Statement II is true
Correct answer
D. Statement I is false but Statement II is true
Step-by-step solution
If heat energy is added to a thermodynamic system, one part increases the internal energy and the other part performs some work. If heat is added to a system, the system can do work without changing its internal energy. Hence, statement 1 is false. The formula to calculate the work done is given by W = ∫ P d V From the above equation, it can be concluded that if W > 0 , i.e., work is done by the system, its volume must increase. Hence, statement II is true.