Students should be able: To explain, using the ideas of the kinetic theory of gases. the variation of volume with temperature of a gas when the pressure is kept constant. The variation of pressure with volume of a gas when temperature is kept constant. Explain Charles' and Boyle's laws of gases. Deduce the general gas law from a given mass of gas which obeys Charles' law. Solve simple problems involving the gas laws. Identify and use instruments for measuring pressure.