STANDARDPhysics-Thermodynamics
STANDARD Physics First Law of Thermodynamics MCQ Question
Type: MCQ-conceptual-Medium-Class 11
A system changes from state X to Y with a change in internal energy measuring to 25 kJ mol⁻¹, by a reversible path and returns from Y to X by an irreversible path. What will be the net change in internal energy?
A
25 kJ
B
25 kJ
C
< 25 kJ
D
Zero
Correct Answer
Option D
Detailed Explanation
For a cyclic process, net change in internal energy is zero. Change in internal energy does not depend on the path by which final stage is reached.
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