What Is the Heat Capacity at Constant Pressure for an Ideal Gas?

[k3r0]

Homework Statement

I have an ideal gas of n=10²³ point particles with a constant pressure of P = 3x10⁵ Pa as 200J of heat flows into it. What is the heat capacity at constant pressure, C_P?

Homework Equations

C_V = (ΔU + PΔV)/ΔT

The Attempt at a Solution

Okay... So I have N, P and Q. I'm not sure if I'm missing something but I have no idea how to even begin finding this without ΔT or ΔV.

(Also, the next part of the problem involves finding delta T, which can be found using Q/C, so I'm assuming I shouldn't be finding it in this part of the question.) This is one part of a multiple part question and I can do the rest of them quite easily -- I feel like I'm missing something.

Any help is appreciated. Thank you!

 

[Borek]

Isn't heat capacity of all ideal gases identical?

http://physics.bu.edu/~redner/211-sp06/class-thermodynamics/heatcap_volume.html

 

[k3r0]

Isn't heat capacity of all ideal gases identical?

http://physics.bu.edu/~redner/211-sp06/class-thermodynamics/heatcap_volume.html

Well, now I feel stupid.

Thanks a lot!