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mediumQ. No. 15180-when-water-is-heated-from-0-c-to-10-c-what-happens-to-its-volume-and-density

When water is heated from 0°C to 10°C what happens to its volume and density?

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AVolume continuously increases density continuously decreases
BVolume first decreases then increases density first increases then decreases
CVolume continuously decreases density continuously increases
DNo change in volume or density
Correct Answer: Volume first decreases then increases density first increases then decreasesYour Answer: B

Explanation

Water shows anomalous expansion between 0 and 10 degrees C which is unique among common liquids. Continuous volume increase and density decrease is NORMAL thermal expansion behaviour. Water does NOT follow this pattern from 0 to 4 degrees C. At exactly 4 degrees C water reaches its maximum density of 1000 kg per cubic metre. Below 4 degrees C the hexagonal ice-like hydrogen bond structure partially persists making water less efficiently packed. Continuous decrease in volume means perpetual contraction which does not happen above 4 degrees C. Temperature change always causes some volume and density change in real liquids.

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