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Unformatted text preview: quasistatically. As a result the gas ﬂows
to the right-hand side, resisted by another piston which applies a constant pressure p2
(p2 < p1 ). Eventually all of the gas occupies a volume V2 on the right-hand side. i. Show that enthalpy, H = E + pV , is conserved.
ii. Find the Joule-Thomson coeﬃcient µJT ≡ ( ∂T )H in terms of T , V , the heat capacity
at constant pressure Cp , and the volume coeﬃcient of expansion α ≡ V ( ∂V )p . (Hint:
You will need to use a Maxwell relation).
iii. What is µJT for an ideal gas?
iv. If we wish to use the Joule-Thomso...
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This document was uploaded on 03/03/2014 for the course DAMTP 1110 at Cambridge.
- Spring '14