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Question

Why is ice is more effective than water in cooling at same temperature?


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Solution

Latent heat of fusion

  • The heat energy required to change 1kg of a solid into liquid at atmospheric pressure at its melting point is known as the latent heat of fusion.
  • This process results in the molecules within the substance becoming less organized.

Ice is more effective than water

  • At the same temperature, ice is more effective than water.
  • At 273K, ice absorbs more heat from the substance than water, allowing it to overcome the latent heat of fusion and hence provide a more effective cooling effect.
  • Water does not absorb any extra heat from the substance.

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