Ice melts when heat energy causes the molecules to move faster, breaking the hydrogen bonds between molecules to form liquid water. In the melting process, the water molecules actually absorb energy.

How does ice melt in water?

Water melts ice because it is at a higher temperature than the ice, so heat energy is transferred from the water to the ice. ... Any substance (solid, liquid or gas) that is at a higher temperature than the ice will be able to transfer heat energy to melt the ice.

Why does ice melt so fast?

Assuming the air and water are both the same temperature, ice usually melts more quickly in water. This is because the molecules in water are more tightly packed than the molecules in the air, allowing more contact with the ice and a greater rate of heat transfer.