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8.31 Sixth Edition

Posted: Sat Feb 02, 2019 9:29 pm
by Alexa Tabakian 1A
Calculate the heat released by 5.025 g of Kr at .400 atm as it cools from 97.6 to 25.0 C at (a) a constant pressure and (b) constant volume.

I tried looking this up in the book and it wants to us to use fractions and stuff like that. Is there another way we learned how to do it in class?

Re: 8.31 Sixth Edition

Posted: Sat Feb 02, 2019 9:58 pm
by aisteles1G
We haven't covered it in class but the book talks about how specific heat at constant volume and pressure is given by 3/2R, 5/2 R, etc. so you would still use the formula q=mC(deltaT) but for C look in the book for the Cv or Cp formula to plug in. the fractions you just have to know I think, maybe they would be given on a test but its a formula so I don't think there is a different way to solve it. Hope this helps!

Re: 8.31 Sixth Edition

Posted: Sun Feb 03, 2019 3:08 pm
by Jocelyne Milke 1G
The Cv and Cp constants are given on the constant and equations sheet too