Fig. 3.1 shows a small block of ice at 0°C and a plastic cup that contains 0.24 kg of water. The initial temperature of the water in the cup is 22.0°C. The block of ice is dropped into the water. [Figure 3.1]

1. (a)Describe, in terms of molecules, how energy is transferred by conduction from the water to the ice.[2]
2. (b)(i)The specific heat capacity of water is 4200 J/(kg°C). Calculate the energy transferred from the 0.24 kg of water as it cools.[2]
3. (b)(ii)Describe how the molecular structure of water at 6.0°C differs from the molecular structure of ice at 0°C.[2]
4. (b)(iii)The plastic cup containing water at 6.0°C is left in a room where the room temperature is 22.0°C. The temperature of the water in the cup rises slowly to room temperature. When the water at 6.0°C is left in a metal cup, the temperature of the water rises to room temperature more quickly. State why the temperature of the water in the cup returns to room temperature more quickly when the cup is made from metal.[1]

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