1. Explain why the heat of vaporization of a substance is much greater than the
ID: 494373 • Letter: 1
Question
1. Explain why the heat of vaporization of a substance is much greater than the heat of fusion for the same substance.2. Explain why the vapor pressure of water in equilibrium with liquid water is temperature dependent?
1. Explain why the heat of vaporization of a substance is much greater than the heat of fusion for the same substance.
2. Explain why the vapor pressure of water in equilibrium with liquid water is temperature dependent?
1. Explain why the heat of vaporization of a substance is much greater than the heat of fusion for the same substance.
2. Explain why the vapor pressure of water in equilibrium with liquid water is temperature dependent?
Explanation / Answer
Ans 1.
When melting of a substance is occur, the molecules get separated to some extent but when the same substance is vaporised the molecules get separated to a greater extent which requires more enery, i.e. more heat.
Ans 2 .
If the temperature of a liquid or solid increases its vapor pressure also increases simultaneously. Conversely, vapor pressure decreases as the temperature decreases.
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