General non-science questions and class announcements.

Chem_Mod
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Joined: Thu Aug 04, 2011 1:53 pm
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This is an equation sheet that one of the TAs made up. The chart is only applicable to ideal gases. Please respond if there are any errors (I may have made a typo or 2). Remember that this may not have every equation for every scenario and that you will still need to know how and when to use these equations. Also, not all of these will be on the equation sheet given, so you should know how to derive these or where they come from.
Attachments helpful thermo eqn sheet.pdf

Hiba Alnajjar_2C
Posts: 108
Joined: Fri Aug 09, 2019 12:17 am

### Re: A helpful equation sheet

Could someone explain when to use Cp or Cv? Is Cp used when the pressure is constant, while Cv is used when the volume is constant? Thank you!

Jared Khoo 1G
Posts: 107
Joined: Wed Sep 18, 2019 12:16 am

### Re: A helpful equation sheet

Hiba Alnajjar_2C wrote:Could someone explain when to use Cp or Cv? Is Cp used when the pressure is constant, while Cv is used when the volume is constant? Thank you!

You got it, also remember how to calculate it when presented with an ideal gas, although it is on the formula sheet.

KaleenaJezycki_1I
Posts: 127
Joined: Sat Aug 17, 2019 12:18 am
Been upvoted: 2 times

### Re: A helpful equation sheet

Thank you guys so much!!

AGaeta_2C
Posts: 112
Joined: Wed Sep 18, 2019 12:21 am

### Re: A helpful equation sheet

Why is DeltaU for constant pressure being calculated using Cv? In order words, why is the change in internal energy for a system under constant pressure (DeltaU) using the Cv value in its calculations? Shouldn't DeltaU = q + w?