## Internal Energy of Ideal Gas

$\Delta U=q+w$

404975170
Posts: 68
Joined: Thu Jul 27, 2017 3:00 am

### Internal Energy of Ideal Gas

I know the equation is U=3/2nRT but in one of the homework problems another equation with U=5/2nRT is mentioned. Does anyone know what the purpose of this second equation is for?

Noah Cook 3O
Posts: 31
Joined: Fri Sep 28, 2018 12:20 am

### Re: Internal Energy of Ideal Gas

The value of 3/2nRT is for monoatomic gases, whereas the 5/2nRT is for diatomics. It is due to the additional axes in diatomics. Can read more about it at http://physics.bu.edu/~duffy/py105/Kinetictheory.html if you want.