9.1 Entropy Higher or Lower at Higher Temperatures


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Grace Ramey 2K
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Joined: Thu Jul 27, 2017 3:01 am

9.1 Entropy Higher or Lower at Higher Temperatures

Postby Grace Ramey 2K » Thu Jan 25, 2018 5:38 pm

9.1
A human body generates heat at the rate of about 100. W
(1 W 1 J .s-').
(a)At what rate does your body heat generate entropy in your surroundings, taken to be at 20.0 C?
(b)How much entropy do you generate each day?
(c)Would the entropy generated be greater or less if you were in a room kept at 30° C? Explain your answer.

I am confused about part C. I understand why the entropy would be less at 30 degrees C, but conceptually, I thought that entropy usually increases as temperature increases. Can someone explain?

Thanks for your help!

Cynthia Tsang
Posts: 52
Joined: Fri Sep 29, 2017 7:07 am
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Re: 9.1 Entropy Higher or Lower at Higher Temperatures

Postby Cynthia Tsang » Thu Jan 25, 2018 6:38 pm

There is actually an equation stating deltaS = -(deltaH)/T. Because of this, we can infer that deltaS is smaller in this situation.

Ashley Davis 1I
Posts: 57
Joined: Fri Sep 29, 2017 7:04 am

Re: 9.1 Entropy Higher or Lower at Higher Temperatures

Postby Ashley Davis 1I » Thu Jan 25, 2018 7:59 pm

yes, in this case ΔS would be inversely proportional to T.


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