(a)[2]
State the meaning of the term ideal gas.
(b(i))[1]
The mean-square speed of the atoms in a fixed mass of ideal gas at $32\,^{\circ}\text{C}$ is $1.9 \times 10^6\, \text{m}^2\text{s}^{-2}$. The gas is then heated at constant volume until its temperature reaches $80\,^{\circ}\text{C}$. Determine the increase, in kelvin, in the gas temperature.
(b(ii))[3]
Determine the root-mean-square (r.m.s.) speed of the atoms when the temperature is $80\,^{\circ}\text{C}$.