Quote Originally Posted by Gary View Post
Open a valve on the top of a refrigerant container. Vapor boils off and the liquid on the bottom gets very cold. Where did it's heat energy go to? It is contained in the escaping vapor.
Yes the vapour hold the energy of transformation which gives the "impression" that the vapour must of cooled the liquid. For the vapour to cool the liquid, then for heat transfer to occur the liquid has to be warmer than the vapour (vapour has to be colder than the liquid).

I supose to be factual; it is the change in pressure that cools the liquid by method of liquid to vapour transformation