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Question

Identify the substance that is more effective in cooling.


A
Water at 80C
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B
Water at 100C
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C
Ice at 0C
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D
Steam at 100C
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Solution

The correct option is C Ice at 0C

Ice at 0C can be more effective in cooling because of the phenomenon called latent heat of fusion. Latent heat of fusion of ice is the heat absorbed by ice to change its state to water at 0C . So, ice at 0C can extract more heat from another substance and give better cooling.


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