CHEMISTRY COMMUNITY

Posted: **Tue Feb 06, 2018 7:54 pm**

For 9.13, why does the answer key use Cv instead of Cp? In this problem the volume is not constant as it is being compressed so shouldn't we use Cp?

Posted: **Tue Feb 06, 2018 8:25 pm**

The answer key doesn't use C of any kind... Are you perhaps looking at the wrong problem?

Posted: **Tue Feb 06, 2018 8:59 pm**

Why doesnt this problem use Cv or Cp, but uses the equation deltaS=n*R*ln(T2/T1)?

Posted: **Tue Feb 06, 2018 9:00 pm**

Naveed Zaman 1C wrote:The answer key doesn't use C of any kind... Are you perhaps looking at the wrong problem?

This problem has an error in it so it is listed on Dr. Lavelle's website on the Solution Manual Errors Document. In this document, Cv is used.

Posted: **Tue Feb 06, 2018 9:42 pm**

The solution manual error says Cv but uses 5/2 R, which is the value for Cp. Maybe the doc has a typo too?

Posted: **Wed Feb 07, 2018 9:46 am**

there's an error in the solution manual. You should be using Cv :)

Posted: **Sat Feb 10, 2018 5:49 pm**

so is there an error in the "Errors in Solution Manual" pdf?

9.13