Moderators: Chem_Mod, Chem_Admin

Posts: 63
Joined: Fri Apr 06, 2018 11:05 am


Postby sharonvivianv » Tue Jan 29, 2019 5:56 pm

I'm doing 8.31 of the sixth edition and to calculate the Cp and Cv, the solutions manual uses R=8.314 J·K^-1·mol^-1 but writes the Cv and Cp in J·C^-1·mol^-1. How does that work???

Eshwar Venkat 1F
Posts: 32
Joined: Fri Sep 28, 2018 12:22 am

Re: HW Q

Postby Eshwar Venkat 1F » Tue Jan 29, 2019 9:42 pm

With heat capacity problems, we're looking for the change in temperature. This means that as long as both temperature values are given in Celsius, there is no need to convert between Celsius and Kelvin and the value of the constant R can be plugged in as is.

Ethan Baurle 1A
Posts: 33
Joined: Fri Sep 28, 2018 12:19 am

Re: HW Q

Postby Ethan Baurle 1A » Tue Jan 29, 2019 9:47 pm

Basically, a change in, say, 10 degrees celsius is the same as a change in 10 Kelvin. So when you're using a value for change in temperature in the equation you can use celsius and Kelvin interchangeably.

Return to “Concepts & Calculations Using First Law of Thermodynamics”

Who is online

Users browsing this forum: No registered users and 1 guest