## Hotdog #5

Volume: $\Delta S = nR\ln \frac{V_{2}}{V_{1}}$
Temperature: $\Delta S = nC\ln \frac{T_{2}}{T_{1}}$

melissa_dis4K
Posts: 106
Joined: Fri Sep 28, 2018 12:28 am

### Hotdog #5

Why do we use constant volume heat capacity instead of constant pressure? Isn't the volume changing? Thanks

Chem_Mod
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### Re: Hotdog #5

The volume of the whole container does not change.

melissa_dis4K
Posts: 106
Joined: Fri Sep 28, 2018 12:28 am

### Re: Hotdog #5

How is the pressure changing?

Gary Qiao 1D
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Joined: Fri Sep 28, 2018 12:26 am

### Re: Hotdog #5

I'm guessing that because the problem doesn't say that the pressure is independent of the temperature, the change in temperature affects a change in the pressure of the system.

Celine Cheng 1H
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### Re: Hotdog #5

I kinda separated the problem into 2 parts-> when the temperature of the container (and both gases) changes and when the volumes of the separate containers change (so volumes of the gases change), so I use isochoral and isothermal formulas. I asked a friend and he said the same thing about how the overall volume of the box (but not the gases) doesn't change though, but the pressure of the gases do (so you know it's not isobaric)

avshi10b
Posts: 6
Joined: Mon Apr 30, 2018 3:00 am

### Re: Hotdog #5

Thank you

Simmi Diwanji 2B
Posts: 32
Joined: Fri Sep 28, 2018 12:20 am

Thank you!