Heat is removed from a gas, and the substance becomes a liquid. How can you explain this?

1 Answer
Apr 4, 2016

You are moving from a gaseous (high energy) phase to a condensed (lower energy) phase.


Let's represent the vaporization reaction:

#"Liquid + heat " rightleftharpoons " Gas"#

This is certainly an equilibrium reaction, and we can designate the energy transfer as a reactant; removal of the heat (cooling) should drive the equilibrium to the left hand side of the equation.