If the total pressure at point E is increased at a constant temperature until a drop of water appears, describe in a sentence what is happening. If the pressure in e) is increased further, describe in a sentence what happens next. Solution At E, the fluid is in gaseous state and the process is converting it into water i.e. liquid state which means, cooling of matter is taking place (at constant temperature in this case ) which can also be called phase change which involves change in the latent heat of the substance..