Midterm: Cp,m and Cv,m

Moderators: Chem_Mod, Chem_Admin

Althea Zhao 1B
Posts: 101
Joined: Mon Jun 17, 2019 7:24 am

Midterm: Cp,m and Cv,m

Postby Althea Zhao 1B » Wed Feb 12, 2020 1:53 pm

For the midterm, do we need to know the values of Cp,m and Cv,m for monatomic gases only, or for linear and nonlinear molecules as well?

Katie Kyan 2K
Posts: 106
Joined: Fri Aug 09, 2019 12:16 am
Been upvoted: 1 time

Re: Midterm: Cp,m and Cv,m

Postby Katie Kyan 2K » Wed Feb 12, 2020 2:09 pm

I believe we only need to know the values for monoatomic gases. These formulas should be given on the formula sheet as well.

Ashley Fang 2G
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

Re: Midterm: Cp,m and Cv,m

Postby Ashley Fang 2G » Tue Feb 18, 2020 12:00 pm

For monoatomic gases, Cv would be 3/2 R and Cp would be 5/2 R.
For linear/diatomic molecules, Cv would be 5/2 R and Cp would be 7/2 R.
For nonlinear molecules, Cv would be 3R and Cp would be 4R.

Naji Sarsam 1F
Posts: 104
Joined: Sat Aug 17, 2019 12:18 am

Re: Midterm: Cp,m and Cv,m

Postby Naji Sarsam 1F » Tue Feb 18, 2020 1:41 pm

An easy way to remember all of the Cp,m values is the equation Cp,m = Cv,m + R. This equation is derived in the chemistry book chapter 4, and it lets you only have to memorize the Cv,m for monoatomic, linear, and nonlinear gasses since the Cp,m is just R plus those values.


Return to “Heat Capacities, Calorimeters & Calorimetry Calculations”

Who is online

Users browsing this forum: No registered users and 1 guest