a sample water vapour is surrounded by approximately 1000 times as much air (by mass), somewhere up in the sky. The vaporizer condenses to form clouds. find the expected increase in temperature of the surrounding air.
use Lv = 2.3 * 10^6 J/kg (for H2O) and use Cair = 1049 J/kgC
also a couple questions, how do you find all of this from a phase diagram