Question

What is the mathematical equation for calculating the internal energy of a

diatomic gas?
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Answer 1

U = 5/2 NkT.

Step-by-step explanation:

A diatomic molecule = H₂, O₂, N₂ .....etc

A diatomic molecule has 5 degrees of freedom.

• 3 transnational modes = x, y, z
• 2 rotational modes = ωx , ωy

So, the internal energy for diatomic gases is :

U = 5/2 NkT.