(adsbygoogle = window.adsbygoogle || []).push({}); [SOLVED] Determining temperature of a diatomic gas

1. Assume 3.0 moles of a diatomic gas has an internal energy of 10kJ. Determine the temperature of the gas after it has reached equilibrium (assuming that molecules rotate and vibrate at that tmeperature).

2.Boltzmann's constant and # of moles 6.022x10^23

3.The average kinetic energy per diatomic gas molecule is (5/2) kB T where kB is Boltzmann's constant.

The number of molecules in 3 moles is 3 * 6.022 x 10^23, so I just solved for T:

10000 J = (5/2)* (1.3807 x 10^-23 J/K) * 3 * (6.022 x 10^23) * T

Which, I get 160k, but the answer is suppose to be 115k, which I have no idea what I did wrong, maybe the wrong constant perhaps? No clue. Thanks for any help given :D

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# Homework Help: Determining temperature of a diatomic gas

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