NEET2017Physics-Thermodynamics
NEET 2017 Physics Internal Energy MCQ Question
Type: MCQ-numerical-Medium-Class 11
A gas mixture consists of 2 moles of O₂ and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is
A
4 RT
B
15 RT
C
9 RT
D
11 RT
Correct Answer
Option D
Detailed Explanation
The internal energy of a gas is given by U = (f/2) nRT, where f is the degrees of freedom. O₂ is diatomic (f=5) and Ar is monoatomic (f=3).
Found an issue with this question?