One assumption of the kinetic theory of gases is that gas molecules behave as if they are hard, elastic identical spheres. State two other assumptions of the kinetic theory of gases.
Using the kinetic theory of gases, it can be shown that the product of the pressure 
and the volume 
of an ideal gas is given by the expression
where 
is the mass of a gas molecule.
State the meaning of the symbol
,
.
Use the expression to deduce that the mean kinetic energy 
of a gas molecule at temperature 
is given by the equation
where 
is a constant.
