Which of the following statements are true regarding the Joule-Thomson coefficient?
1
Joule-Thomson coefficient is given by \({{\mu }_{J}}={{\left( \frac{\partial P}{\partial T} \right)}_{h}}\)
2
Right to inversion point on an isenthalpic line, μJ is positive.
3
Joule-Thomson coefficient for ideal gases is zero.
4
Right to inversion point on an isenthalpic line, μJ is negative.