Chemistry
NULL
Medium
Question
If heat is to be supplied continuously to a liquid at its boiling point, the temperature remains constant because:
A
Extra heat is spread in the air
B
High energy molecules continuously leaving the surface of liquid
✓ Official correct answer
C
The forces of attractions become stronger
D
The vapour pressure of the boiling liquid becomes greater than the external pressure
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A
Extra heat is spread in the air
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B
High energy molecules continuously leaving the surface of liquid
No member explanations yet for this option.
C
The forces of attractions become stronger
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D
The vapour pressure of the boiling liquid becomes greater than the external pressure
No member explanations yet for this option.
Explanation
At the boiling point, all the heat supplied goes into vaporizing high-energy molecules leaving the surface (latent heat), rather than raising the temperature further, so the temperature stays constant.
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