Rate Of Evaporation
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During the first experiment day when more water was available near the surface of permeable materials the evaporation rate ranged from 0 5 to 1 5 mm h which was much higher than that 0 1 0 3 mm h on the second and third day with less moisture available near the surface.
Rate of evaporation. The heat supply required to maintain the temperature of the water in the swimming pool can be calculated as. The rate of ideal evaporation j in a vacuum as a function of temperature is best described using the langmuir equation. The key factors that affect the rate of evaporation of a liquid are. Evaporation can be defined as the process through which a liquid generally water is converted into a gas vapour without being heated to its boiling point.
2 8 1 j p v 2 πmrt where m is the molar mass of the evaporating species r is the ideal gas constant t the absolute temperature and pv is the vapor pressure of the evaporating species. Using propanone on microscope slides students change the conditions and time how long it takes for the propanone to evaporate. The greater the temperature of the liquid and its surroundings the faster the rate of evaporation. Rate of evaporation in this classic experiment from the royal society of chemistry students investigate factors affecting evaporation.
G s 34 5 kg m 2 h 1000 m 2 0 014659 kg kg 0 0098kg kg 3600 0 047 kg s. The evaporation from the surface can be calculated as.
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