Rules for constant pressure

Volume:
Temperature:

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Hope Hyland 2D
Posts: 50
Joined: Wed Feb 20, 2019 12:16 am

Rules for constant pressure

Postby Hope Hyland 2D » Sat Feb 15, 2020 9:13 am

What equations/assumptions do you use when it tells you there is constant pressure? What about constant volume?

Veronica_Lubera_2A
Posts: 106
Joined: Sat Sep 14, 2019 12:16 am
Been upvoted: 1 time

Re: Rules for constant pressure

Postby Veronica_Lubera_2A » Sat Feb 15, 2020 11:59 am

These are just a few but at constant pressure, q=DeltaH and w=-PDeltaV
At constant volume, w=0 and you can evaluate the formulas using this information.

Caitlyn Tran 2E
Posts: 100
Joined: Fri Aug 09, 2019 12:15 am

Re: Rules for constant pressure

Postby Caitlyn Tran 2E » Sat Feb 15, 2020 2:12 pm

As stated before, in constant pressure, you can assume that and while in constant volume, you can assume that w = 0 since delta V would be 0. However, you can also use the heat capacity () for constant pressure and the heat capacity () for constant volume. Hope this helps!

Jacob Motawakel
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Joined: Wed Sep 18, 2019 12:20 am
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Re: Rules for constant pressure

Postby Jacob Motawakel » Sat Feb 15, 2020 3:03 pm

At constant pressure, Work = Pressure * Volume, q=Enthalpy, and at constant volume work=0 .

Kayli Choy 2F
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

Re: Rules for constant pressure

Postby Kayli Choy 2F » Sat Feb 15, 2020 8:57 pm

Additionally, isochoric/isovolumetric/isometric all mean constant volume, isobaric means constant pressure, and isothermal means constant temperature.


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