isothermal system

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Clement Ng
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isothermal system

Postby Clement Ng » Wed Jan 24, 2018 8:23 pm

In an isothermal system, if the change in moles is not zero, would delta U still be zero?

Clarisse Wikstrom 1H
Posts: 63
Joined: Fri Sep 29, 2017 7:05 am

Re: isothermal system

Postby Clarisse Wikstrom 1H » Wed Jan 24, 2018 9:45 pm

In an isothermal system, deltaT is zero vecause the temperature is constant. For an ideal gas, deltaU=(3/2)nRdeltaT. Therefore, if deltaT=0, then deltaU=0. I believe this is only for ideal gases...

Sarah Maraach 2K
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Joined: Thu Jul 27, 2017 3:00 am

Re: isothermal system

Postby Sarah Maraach 2K » Sun Jan 28, 2018 1:18 pm

As far as isothermal systems go, I don't believe we can have a problem in which number of moles change since matter is neither created nor destroyed. However, the important part of an isothermal system is that temperature doesn't change. In this case, deltaU would be zero since our equation is dependent on change in T.

Christina Bedrosian 1B
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Joined: Fri Sep 29, 2017 7:05 am

Re: isothermal system

Postby Christina Bedrosian 1B » Sun Jan 28, 2018 5:51 pm

The important part is isothermal, meaning deltaT would be 0 making deltaU 0 (since anything *0=0).

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