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Which of the following does NOT increase the rate of evaporation?
Decrease in temperature
Increase in surface area
Increase in wind speed
Decrease in humidity
Decrease in temperature
A decrease in temperature decreases the rate of evaporation because lower temperature means lower kinetic energy of the liquid molecules, making it harder for them to escape into the vapor phase.
A decrease in temperature decreases the rate of evaporation because lower temperature means lower kinetic energy of the liquid molecules, making it harder for them to escape into the vapor phase.
Wet clothes dry much faster under the hot sun (high temperature) than on a cold, cloudy winter day (low temperature).
SURT: Surface area up, Temperature up, Wind speed up, Humidity down тАФ these increase evaporation!
KE=23тАЛkBтАЛT тАФ Kinetic energy is directly proportional to temperature
RтИЭA,T,v тАФ Rate of evaporation increases with Area (A), Temperature (T), and Wind speed (v)
Evaporation is a surface phenomenon where liquid molecules gain sufficient thermal energy to overcome intermolecular attractive forces and escape into the atmosphere as gas. Higher temperatures increase molecular kinetic energy, accelerating evaporation, whereas a decrease in temperature reduces the average kinetic energy of molecules, thereby slowing down the rate of evaporation.
Evaporation is a surface phenomenon occurring at all temperatures below boiling point.
Higher temperature gives molecules enough kinetic energy to overcome intermolecular forces.
Humidity is inversely proportional to the rate of evaporation.
Surface area and wind speed both have a direct positive effect on evaporation.
Cooling caused by evaporation is utilized in earthen pots (matka) and desert coolers.
Low evaporation rates in humid or cold climates cause high drying times for clothes and agricultural crops.
Sweating and perspiration in human body for thermoregulation
Drying of wet clothes and salt extraction from seawater
Option A (Decrease in temperature) lowers the average kinetic energy of molecules, thus reducing the rate of evaporation.
Options B, C, and D all describe conditions (increase in surface area, increase in wind speed, and decrease in humidity) that actively accelerate evaporation.
A is correct тАФ Decrease in temperature lowers the kinetic energy of liquid molecules, thereby reducing (not increasing) the rate of evaporation.
Remember that evaporation causes cooling because the high-energy molecules escape, lowering the average kinetic energy of the remaining liquid.
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