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April 25, 2015

Homework Help: Chemistry - Science (Dr. Bob222)

Posted by Ana on Thursday, May 8, 2014 at 8:44am.

Nitrogen gas has values of Cv and Cp of 20.8 and 29.1 J K-1 mol-1, respectively. When a certain amount of nitrogen is heated at constant pressure, what fraction of the heat Q is used to increase the internal energy of the gas, and how is the remaining energy used?

A) 3/2 of Q is used to increase internal energy, the rest used for work.
B) All of Q is used to increase the internal energy of the gas and there is no remaining energy.
C) ~ 0.7 (70%) of Q is used to increase the internal energy and the rest goes to pressure-volume work.
D) Most of Q is used up as work in the expansion of the gas at constant pressure.
E) 58% of Q does work, and the rest goes to increasing the internal energy of the gas.

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