STANDARDPhysics-Thermodynamics
STANDARD Physics First Law of Thermodynamics MCQ Question
Type: MCQ-conceptual-Medium-Class 11
When an Ideal monoatomic gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas is
A
2/5
B
3/5
C
3/7
D
5/7
Correct Answer
Option B
Detailed Explanation
By the first law of thermodynamics, Q = U + W. The fraction of heat energy supplied is U/Q = (3/2)nRT / (5/2)nRT = 3/5.
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