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9.7

Posted: Thu Feb 01, 2018 9:15 pm
by Esin Gumustekin 2J
Does anyone understand the equation Cp=5/2R? It is used in this problem and I don't understand what this equation is and why we need to use it for this problem.

Thanks!

Re: 9.7

Posted: Thu Feb 01, 2018 9:17 pm
by Riya Pathare 2E
This gives us the heat capacity for an ideal gas at constant pressure so we use it so we can plug it into our entropy equation to solve.

Re: 9.7

Posted: Thu Feb 01, 2018 9:24 pm
by Cali Rauk1D
how do you know when you are suppose to use the fractions?

Re: 9.7

Posted: Thu Feb 01, 2018 9:40 pm
by skalvakota2H
We can substitute the expressions for the heat capacities at both constant volume and pressure if we are aware of the molecular complexity. This means classifying the substance as monatomic, linear molecule, or nonlinear molecule.

Re: 9.7

Posted: Fri Feb 02, 2018 10:28 am
by Sarkis Sislyan 1D
Also, the value of Cp as well as Cv will be given to us on exams.

Re: 9.7

Posted: Fri Feb 02, 2018 12:01 pm
by Adam Enomoto 1L
I’m confused about what does the fraction means

Re: 9.7

Posted: Fri Feb 02, 2018 12:33 pm
by Jeremiah Samaniego 2C
I don't think we have to necessarily know the details of how we get the fractions, but pages 277 and 281 in the textbook explain what those values are and how they come to be.

Re: 9.7

Posted: Sat Feb 03, 2018 2:17 pm
by Shreya Ramineni 2L
We just need to know that its for a monatomic ideal gas atom. The C=5/2 R is on the formula sheet if I remember correctly!