Test #1 question

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Samantha Joseph 1F
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Test #1 question

Postby Samantha Joseph 1F » Tue Mar 13, 2018 12:20 pm

What is the main reasoning as to why heat is being transferred in this process?

"A balloon filled with gas is expanded to a larger volume and lower pressure while maintaining the same temperature."

sahajgill
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Re: Test #1 question

Postby sahajgill » Tue Mar 13, 2018 12:34 pm

Since the system is isothermal, we know that the change in internal energy is 0. So q+w=0, and q=-w. Since the balloon is expanding its volume against a changing pressure, work is being done. This also means that the energy lost during work is gained as heat, because the internal energy must stay 0. So heat is transfered in the system.

Ammar Amjad 1L
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Re: Test #1 question

Postby Ammar Amjad 1L » Tue Mar 13, 2018 3:31 pm

Hey,
Here is a link to a post that answers your question.
viewtopic.php?f=130&t=26787


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