Transferring of Heat

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Jacquelyn Hill 1
Posts: 41
Joined: Sat Jul 22, 2017 3:01 am

Transferring of Heat

Postby Jacquelyn Hill 1 » Sun Mar 11, 2018 4:47 pm

In the situation that "A ballon filled with gas expands to a larger volume and lower pressure while maintaining the same temperature," how is heat considered to be transferred in the process?

Paula Dowdell 1F
Posts: 72
Joined: Tue Nov 15, 2016 3:00 am

Re: Transferring of Heat

Postby Paula Dowdell 1F » Sun Mar 11, 2018 4:57 pm

The balloon expands because the kinetic energy increases due to the warmer temperature, making the molecules move faster and hit the inside of the balloon harder and more frequently.

Jacquelyn Hill 1
Posts: 41
Joined: Sat Jul 22, 2017 3:01 am

Re: Transferring of Heat

Postby Jacquelyn Hill 1 » Sun Mar 11, 2018 8:30 pm

How is this caused by a warmer temperature because it says that it maintains the same temperature

Luis De La Cruz 1H
Posts: 37
Joined: Fri Sep 25, 2015 3:00 am

Re: Transferring of Heat

Postby Luis De La Cruz 1H » Sun Mar 11, 2018 9:47 pm

In this situation, I believe that the balloon filled with gas is expanding and thus the gas is doing work on the balloon (causing the expansion), but at the same time heat is given off by the balloon, and this is what is maintaining the same temperature. Remember when temperature is kept constant, we can say that delta(U)=0, and since delta(U)= w+q, it follows that w=-q. -q being the heat given off by the balloon, and +w being the work done on the balloon.

Jacquelyn Hill 1
Posts: 41
Joined: Sat Jul 22, 2017 3:01 am

Re: Transferring of Heat

Postby Jacquelyn Hill 1 » Tue Mar 13, 2018 6:38 pm

Oh okay thank you, this helped alot!


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