JEE Main 2024 Physics question
A gas mixture consists of 8 moles of argon and 6 moles of oxygen at temperature T. Neglecting all vibrational modes, the total internal energy of the system is
Answer: (A)
Solution
U = Σ nᵢ(fᵢ/2)RT = 8 × (3/2)RT + 6 × (5/2)RT = 12RT + 15RT = 27 RT.