Initial temperature of gas for maximum cooling effect in Joule-Kelvin expansion - Thermodynamics

Q.  What should be the initial temperature of gas to obtain maximum cooling effect in the Joule-Kelvin expansion?
- Published on 20 Aug 15

a. the initial temperature of gas should be less than the temperature corresponding to inversion point of isenthalpic curve of the expansion of gas
b. the initial temperature of gas should be more than the temperature corresponding to inversion point of isenthalpic curve of the expansion of gas
c. the initial temperature of gas should be equal the temperature corresponding to inversion point of isenthalpic curve of the expansion of gas
d. none of the above

ANSWER: the initial temperature of gas should be equal the temperature corresponding to inversion point of isenthalpic curve of the expansion of gas

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