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Which of the following change is observe...

Which of the following change is observed occurs when a substance X is converted from liquid to vapour phase at the standard boiling point?
I. Potential energy of the system cecreases
II. The distance between molecules increases
III.The average kinetic energy of the molecules in both phases are equal

A

I only

B

II only

C

III only

D

II and III only

Text Solution

Verified by Experts

The correct Answer is:
d
(d) Due to phase transfer distance between particle changes, because temperature remains constant, so KE remains constant.
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