This question is about specific latent heat.

1. (a)(i)A student investigates the melting of ice. The student uses the apparatus shown in the diagram. [Figure 7] Name the piece of apparatus labelled Y in the diagram.[1]
2. (a)(ii)The specific latent heat of fusion of ice is 3.34 × 10⁵ J/kg. Calculate the energy required to melt 0.050 kg of ice.[2]
3. (b)A student wants to investigate the specific latent heat of vaporisation of water. State two ways the student can improve the accuracy of the investigation.[2]
4. (c)Explain, in terms of particles, what happens when a liquid changes into a gas.[5]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.