Molar heat Capacity at Constant Pressure

Molar heat Capacity at Constant Pressure - T if we assume a...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Molar heat Capacity at Constant Pressure Suppose that, while heat is added to the system, the volume is changed such that the gas pressure does not change. Again, the change in the internal energy of the system is given by where C p is the molar heat capacity at constant pressure . This expression can be rewritten as For an ideal gas (pV = nRT) we can relate V to
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: T, if we assume a constant pressure ∆ ∆ Using this relation, the first law of thermodynamics can be rewritten as or However, the internal energy U depends only on the temperature and not on how the volume and/or pressure is changing. Thus, U/ T = 3/2 n R = n C ∆ ∆ V . The previous equation can therefore be rewritten as or We see that C p C ≠ V ....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online