Question

For 1 kg of water, which phase change requires more energy?

Options

• Boiling needs less energy than melting

• Melting needs more energy than boiling

• Both need the same energy

• Boiling needs much more energy than melting

Answer 1

Boiling needs much more energy than melting

Explanation:

The latent heat of vaporisation is much greater than the latent heat of fusion.