Which of the following processes involve the absorption of energy to effect a phase change ?
A
Boiling
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B
Freezing
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C
Melting
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D
Condensation
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Solution
The correct options are A Boiling C Melting The phase change involving the absorption of energy are boiling and melting during which the intermolecular bonds break. This causes state change from solid to liquid in melting and from liquid to gas in boiling.