Question

(i) What is the effect of pressure on the boiling point and freezing point of water
(ii) Show graphically the effect of temperature on the density of water

Answer 1

Increasing the temperature above the boiling point, 212°F(100°C) , causes water to change from liquid to gas(water vapour). The melting/freezing point changes with pressure. The boiling point of water varies with atmospheric pressure. At lower pressure or higher altitude, the boiling point is lower.