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K Stefanescu 2I
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Joined: Fri Sep 29, 2017 7:04 am


Postby K Stefanescu 2I » Mon Feb 05, 2018 7:50 am

Where did U=(3/2)nRT come from? How was it derived?

Nina Gautam 1K
Posts: 52
Joined: Fri Sep 29, 2017 7:04 am

Re: Formula

Postby Nina Gautam 1K » Mon Feb 05, 2018 8:32 am

That is the equation for the internal energy of an ideal gas. Here is a very useful video link describing it clearly: ... -u-3-2-nrt
Hope this helps!

Ryan Sydney Beyer 2B
Posts: 82
Joined: Fri Sep 29, 2017 7:07 am
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Re: Formula

Postby Ryan Sydney Beyer 2B » Mon Feb 05, 2018 10:42 am

The 3/2 is a number specific to monoatomic ideal gases. R, the ideal gas constant, is avogadro's number * Boltzmann's constant. This equation can be expressed in a different way as , where N in the number of molecules. This shows that there is a direct relation between the number of molecules and the thermal energy. Also a relationship between temperature and thermal energy is present here.

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