Question on Cv(vap)

[Jessica Nunez 1I]

A pressure cooker containing 100.0 g of liquid water at 25 C is placed on the stove until all water becomes superheated steam at 121 C. Assume no steam escapes the pressure cooker.

a) Find q from 25C to 100C
b) Find q during boiling
c) Find any other heat gained or lot by the water as it goes from 25C to 121C. (Hint: Use Cv (vap) in your calculation involving superheated steam.)

Part C hints to use Cv (vap), but how do we calculate the value of Cv (vap)? Is the value of Cv (vap) supposed to be a constant?

[Andy Nguyen 1A]

Cv(vap) is a constant, 2.01 (J/C*g). It was in table 8.2.

[Veronica Rasmusen 2B]

Cv(vap) is 2.01 (J/C*g) for H2O, it is not something you calculate but will be given, or you can look it up.