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!
9.7
Moderators: Chem_Mod, Chem_Admin
-
- Posts: 74
- Joined: Sat Jul 22, 2017 3:01 am
- Been upvoted: 1 time
Re: 9.7
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.
-
- Posts: 51
- Joined: Fri Sep 29, 2017 7:03 am
-
- Posts: 52
- Joined: Sat Jul 22, 2017 3:01 am
Re: 9.7
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.
-
- Posts: 31
- Joined: Thu Jul 27, 2017 3:00 am
-
- Posts: 53
- Joined: Fri Sep 29, 2017 7:03 am
-
- Posts: 33
- Joined: Fri Sep 29, 2017 7:05 am
Re: 9.7
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.
-
- Posts: 50
- Joined: Fri Sep 29, 2017 7:07 am
Re: 9.7
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!
Return to “Concepts & Calculations Using Second Law of Thermodynamics”
Who is online
Users browsing this forum: No registered users and 6 guests