Which statement about the energy of a phase change is true?
2 answers:
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Answer: The correct answer is option B.
Explanation:
Average kinetic energy of the gas molecule is given by relation:
= Avogadro Number
T = Temperature of the gas in Kelvins.
R = Universal gas constant
With increase in temperature the kinetic energy of the gas molecule increases and vice-versa.
So, according to the question the explanation for a drop in temperature of the gas is decrease in average kinetic energy of the gas molecules.
Hence, the correct answer is option B.