Inversion curve in isenthalpic expansion or Joule-Kelvin expansion - Thermodynamics

Q.  What is the inversion curve in isenthalpic expansion or Joule-Kelvin expansion?
- Published on 19 Aug 15

a. the locus of all points at which Joule-Kelvin coefficient is negative
b. the locus of all points at which Joule-Kelvin coefficient is positive
c. the locus of all points at which Joule-Kelvin coefficient is zero
d. none of the above

ANSWER: the locus of all points at which Joule-Kelvin coefficient is zero

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