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Question
How does the density of a liquid (or gas) vary with temperature?
How does the density of a liquid (or gas) vary with temperature?
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Solution
- Most of the liquids increase in volume with an increase in temperature, but water shows anomalous behaviour.
- Water has the maximum volume at 4°C and maximum density at 4°C.
- Actually, when volume increases density decreases and when volume decreases the density increases.
- But water when cooled from a high temperature, contracts up to 4°C because volume decreases and expands when cooled further below 4°C and hence the density of water increases when it is cooled up to 4°C while decreases when cooled further below 4°C. In other words, the density of water is maximum at 4°C equal to 1 gcm−3 or 1000 kg m−3.
- Most of the liquids increase in volume with an increase in temperature, but water shows anomalous behaviour.
- Water has the maximum volume at 4°C and maximum density at 4°C.
- Actually, when volume increases density decreases and when volume decreases the density increases.
- But water when cooled from a high temperature, contracts up to 4°C because volume decreases and expands when cooled further below 4°C and hence the density of water increases when it is cooled up to 4°C while decreases when cooled further below 4°C. In other words, the density of water is maximum at 4°C equal to 1 gcm−3 or 1000 kg m−3.
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