Question 940: Thermodynamics & KTG

Question

A gas mixture consists of 2 moles of O
2
and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is

Accepted Answer

Internal energy of the system is given by
$$U = {f \over 2}nRT$$
Degree of freedom
F
diatomic
= 5
f
monoatomic
= 3
and, number of moles n(O
2
) = 2
n(Ar)  = 4
$${U_{total}} = {5 \over 2}\left( 2 \right)RT + {3 \over 2}\left( 4 \right)RT = 11RT$$

Answer

15 RT

Answer

9 RT

Answer

11 RT

Answer

4 RT

Thermodynamics & KTG

A gas mixture consists of 2 moles of O 2 and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is

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