(a)[2]
A sample of oxygen has a volume of $540\,\text{cm}^3$ at room temperature and pressure. The temperature of the sample is raised but the pressure remains unchanged. Describe and explain, in terms of kinetic particle theory, what happens to the volume of the sample.
(b)[3]
Sulfur is a gas above $445^{\circ}\text{C}$. Describe how particle separation, arrangement and motion change when a sample of sulfur gas is cooled to room temperature.
(c)[1]
Describe diffusion using kinetic particle theory.
(d)[3]
A sulfide ion has the symbol $^{33}_{16}\text{S}^{2-}$. Complete Table 7.1 for this sulfide ion.