Question

what is H2O expansion?​

Answer 1

The fact that water reaches a maximum density at about 4°C causes bodies of water to freeze on the top first. ... The expansion upon freezing comes from the fact that water crystallizes into an open hexagonal form. This hexagonal lattice contains more space than the liquid state.

Answer 2

Answer:

The expansion of water is a abnormal property of water.

Explanation:

It expands instead of contracting when the temperature goes from 4° to 0°C and it becomes less dense. The density become less as it freezes because molecules of water forms open crystal structure when in solid form