The amount of heat required to vaporize one mole of liquid at its _ is called molar heat of vaporization.
Correct answer: B. Boiling point
- A. Melting point
- B. Boiling point
- C. Freezing point
- D. Cooling point
Explanation
Boiling point is the phenomenon in which one mole of a liquid is vaporized.The molar heat of vaporization, also known as the enthalpy of vaporization, is the amount of heat required to vaporize one mole of a substance at its boiling point while keeping the pressure constant.The molar heat of vaporization can be calculated using the equation:ΔHvap = q/m
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About Evaporation, Boiling Point and Vapour Pressure
Evaporation is the escape of higher-energy molecules from a liquid surface, while vapour pressure is the pressure exerted by vapour in equilibrium with that liquid. The topic distinguishes evaporation from boiling and relates both to temperature, intermolecular forces, surface area, atmospheric pressure and the boiling point.
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