How Does Pressure Affect Heat Capacity in Identical Systems?

[dripdrop]

I understand that the heat capacity of something run at constant volume is lower than at constant pressure, as at constant pressure the substance can expand, so some of the energy put into the system is used for work.

If i have two identical systems and heat them under constant pressure conditions, one system at higher pressure than the other. which will have the higher heat capacity and why?

cheers.

 

[daumphys]

If i have two identical systems and heat them under constant pressure conditions, one system at higher pressure than the other. which will have the higher heat capacity and why?

cheers.

This condition is impossible thermodynamically. To do this, you need to add more molecules or increase temperature, or decrease volume.