The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is
A
0
B
∞
C
+ve
D
-ve
Correct Answer: +ve
For cooling to take place by throttling the Joule-Thomson coefficient must be negative. $${\left( {\frac{{\partial T}}{{\partial P}}} \right)_H} = - VE.$$