(a)[2]
The liquid has a specific heat capacity of $4.2\,\text{J}\,(\text{g}\,^{\circ}\text{C})^{-1}$. Calculate the thermal energy transferred out when $330\,\text{g}$ of this liquid cools from $15\,^{\circ}\text{C}$ to $2\,^{\circ}\text{C}$.
(b)[2]
If water at $0\,^{\circ}\text{C}$ is put in the jug instead of melting ice, the cooling happens more slowly. Explain why the cooling is quicker with melting ice in the jug than with water at $0\,^{\circ}\text{C}$.
(c)[1]
The liquid in the metal can cools more quickly than the liquid in the plastic bottle. Suggest a reason for this.