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Question

How does the average kinetic energy of the molecules of a substance changes during its change in phase at a constant temperature, on heating?

A
It increases
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B
It decreases
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C
It does not change
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D
Can't say
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Solution

The correct option is C It does not change
Answer is C
Kinetic energy of molecule is function of temperature and during phase change temperature remains constant ,hence KE remains same.

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