Joule-Thomson co-efficient which is defined as, η = (∂T/∂P)H = 1/Cp (∂H/∂T)P, changes sign at a temperature known as inversion temperature. The value of Joule-Thomson co-efficient at inversion temperature is (A) 0
(B) ∞
(C) +ve
(D) -ve
(B) ∞
(C) +ve
(D) -ve