PhysicsA gas mixture consists of 2 moles of O2 and 4 moles of Ar at same temperature T. Neglecting all vibrational modes, the total internal energy of the system is:

A gas mixture consists of 2 moles of O₂ and 4 moles of Ar at same temperature T. Neglecting all vibrational modes, the total internal energy of the system is:

A
11 RT
B
4 RT
C
15 RT
D
9 RT

Solution:

$U = \frac{n_{1} f_{1}}{2} RT + \frac{n_{2} f_{2}}{2} RT$
f - No. of degrees of freedom
f₁ for diatomic gas = 5
f₂ for monoatomic gas = 3
$∴ U = \frac{2 \times 5}{2} (RT) + \frac{4 \times 3}{2} (RT); U = 11 RT$

Related content

Difference Between Mass and Weight

Differences & Comparisons Articles in Physics

Important Topic of Physics: Reynolds Number

Distance Speed Time Formula

Refractive Index Formula

Mass Formula

Electric Current Formula

Electric Power Formula

Resistivity Formula

Weight Formula