Volume of the Universe

Volume:
Temperature:

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Helen Struble 2F
Posts: 97
Joined: Sat Aug 24, 2019 12:17 am

Volume of the Universe

Postby Helen Struble 2F » Sun Feb 16, 2020 5:42 pm

So, for calculating entropy of a system vs. the surroundings vs. the total entropy, should we just assume that the entropy of the surroundings is only affected by heat? Is this based on the assumption that any volume change due to piston expanding or contracting is negligible compared to the volume of the universe?

Juliet Stephenson 4E
Posts: 100
Joined: Wed Sep 18, 2019 12:21 am

Re: Volume of the Universe

Postby Juliet Stephenson 4E » Sun Feb 16, 2020 6:14 pm

Yes, I would say this is a correct assumption.

Anokhi Patel 2B
Posts: 76
Joined: Fri Aug 09, 2019 12:17 am

Re: Volume of the Universe

Postby Anokhi Patel 2B » Sun Feb 16, 2020 6:57 pm

Yes, the temperature of the universe does not change, so the change in entropy is the negative heat of the system minus heat of the surroundings.

SimranSangha4I
Posts: 99
Joined: Sat Sep 14, 2019 12:17 am

Re: Volume of the Universe

Postby SimranSangha4I » Sun Feb 16, 2020 7:01 pm

Yes! That sounds right since the heat of the universe doesn't change.

William Francis 2E
Posts: 101
Joined: Wed Sep 18, 2019 12:20 am

Re: Volume of the Universe

Postby William Francis 2E » Sun Feb 16, 2020 7:27 pm

Yes. The universe is pretty large compared to the piston, so the volume change is pretty negligible.


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