which occurs when a substance x is converted from liquid to vapour phase at the standard boiling point?I. Potential energy of the system decreasesII. The distance between molecules increasesIII. The average kinetic energy of the molecules in both phases are equal

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I only

II only

III only

II and III only

answer is D.

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Detailed Solution

Due to phase transfer distance between particle changes, because temperature remains constant, so KE remains constant.

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