Internal Energy with Constant Volume


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Maria Davila 2I
Posts: 12
Joined: Fri Sep 26, 2014 2:02 pm

Internal Energy with Constant Volume

Postby Maria Davila 2I » Mon Jan 26, 2015 11:09 pm

For Quiz 1 Prep Winter 2014, question 2 seems tricky in the sense that


where volume is constant and since
with v=0, then w=0 .

So in the end you will have


which is +2.50kJ.

Is this the correct thought process behind this?

Maria Davila 2I
Posts: 12
Joined: Fri Sep 26, 2014 2:02 pm

Re: Internal Energy with Constant Volume

Postby Maria Davila 2I » Mon Jan 26, 2015 11:11 pm

Actually,
not V=0 .

Niharika Reddy 1D
Posts: 127
Joined: Fri Sep 26, 2014 2:02 pm

Re: Internal Energy with Constant Volume

Postby Niharika Reddy 1D » Mon Jan 26, 2015 11:21 pm

Yes, that's the reasoning behind it! Since volume is constant, there's no change in volume, thus work=0 and change in internal energy=q+w=q+0=q=+2.50kJ

Maria Davila 2I
Posts: 12
Joined: Fri Sep 26, 2014 2:02 pm

Re: Internal Energy with Constant Volume

Postby Maria Davila 2I » Mon Jan 26, 2015 11:55 pm

Thanks so much Niharika, you have been a great help in many of these posts!

Niharika Reddy 1D
Posts: 127
Joined: Fri Sep 26, 2014 2:02 pm

Re: Internal Energy with Constant Volume

Postby Niharika Reddy 1D » Tue Jan 27, 2015 12:00 am

No problem, glad I was able to help! :)


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