# Diatomic ideal Gas

Hi,
I try to understand a cycle process with an diatomic ideal Gas.

Question:
Is it possiblie to use the ideal gas law:

$pv=NkT$

for the diatomic gas?

I thought it is just for monoatomic.

Thx
Abby

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DrClaude
Mentor
Is it possiblie to use the ideal gas law:

$pv=NkT$

for the diatomic gas?
Yes, an ideal gas need not be monatomic.

Philip Wood
Gold Member
DrClaude is right, of course. Almost all the molecules (O2 and N2) in air are diatomic, and at very low densities air obeys pV = nRT more and more closely.

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