Rate of evaporation does not depend on
Correct answer: C. External pressure
- A. Surface area
- B. Temperature
- C. External pressure
- D. Humidity
Explanation
The rate of evaporation does not depend on external pressure because the process of evaporation does not involve the compression or expansion of gases.For example, consider a container of water that is placed in a vacuum chamber. Even though the external pressure inside the chamber is decreased, the rate of evaporation of the water will remain the same because the process of evaporation is determined by the energy of individual molecules and their ability to escape the surface of the liquid. In other words, the rate of evaporation is determined by the internal properties of the liquid and not by external factors like pressure.
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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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