Isolated systems

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Lucia H 2L
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Isolated systems

Postby Lucia H 2L » Sat Mar 17, 2018 9:41 pm

Are all isolated systems rigid like a bomb calorimeter (i.e. volume will never change?

Also, how does qsys = -qsurr if no heat is being exchanged?

Ozhen Atoyan 1F
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Re: Isolated systems

Postby Ozhen Atoyan 1F » Sat Mar 17, 2018 9:57 pm

The bomb calorimeter has a constant volume, so it doesn't change. You would have the reaction giving off heat or gaining heat from the calorimeter.

Katelyn B 2E
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Joined: Fri Sep 29, 2017 7:05 am

Re: Isolated systems

Postby Katelyn B 2E » Sun Mar 18, 2018 12:35 am

Usually in a bomb calorimeter, there is some mass of water and some sample (let's say octane) burning. The system we are concerned with would be the octane, and its surroundings would be the water. While burning, the octane would release heat and the water would absorb it. So, within the bomb calorimeter, the concept of qsys = -qsurr still applies.

Troy Tavangar 1I
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Joined: Fri Sep 29, 2017 7:04 am

Re: Isolated systems

Postby Troy Tavangar 1I » Sun Mar 18, 2018 12:41 am

Yes the volume in an isolated system doesn't change.

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