(a)[3]
The steel rod has a mass of 2.0 kg and begins at 500 ^{\circ}C. Once it is placed in the water, it cools to 50 ^{\circ}C. The specific heat capacity of steel is $460\,\text{J}\,(\text{kg }^{\circ}\text{C})^{-1}$. Calculate the thermal energy (heat) lost by the steel rod as it cools to 50 ^{\circ}C.
(b(i))[1]
State one difference between boiling and evaporation.
(b(ii))[2]
As the water cools, the rate of evaporation falls. Explain why this occurs, using ideas about molecules.