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Question

Why does the temperature remain constant during boiling?


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Solution

Boiling point

  • At atmospheric pressure, the boiling point of a liquid is the temperature at which it boils and transforms rapidly into a gas.

Reason for not an increase in temperature

  • When a liquid, such as water, begins to boil, the temperature of the water does not rise even when the heat supply is constant.
  • The excess heat given to boiling water is used to vaporize water, which is known as latent heat of vaporization.
  • So, the temperature does not rise because the given energy is used to change the state of the liquid.

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