When water at 4°C is heated, it expands. When water at 4°C is cooled, it A)contracts, B)expands, C)neither contracts nor expands, D)not enough information given, Which follows from the fact that E)cooling decreases the kinetic energy of H₂O molecules. F)water has its greatest density at 4°C. G)we do not know how the water is cooled.

Question

Quizplus · Accepted Answer

Water expands when cooled from 4°C because it has its greatest density at this temperature. Cooling below 4°C causes the molecules to arrange in a structure that takes up more space, leading to expansion.

When Water at 4°C Is Heated, It Expands