Evaporation

EvaporationEvaporation is the change of a liquid into a gas at the surf... More is the change of a liquid into a gas at the surface. It occurs at any temperature but occurs more rapidly at higher temperatures because heat imparts more kinetic energyEnergy is the property of matter and radiation which is mani... to the molecules and they escape from the surface faster.

Increased gas pressure on the surface of the liquid reduces the rate of evaporation because more collisions occur between the evaporating liquid molecules and the gas molecules, resulting in some of the evaporated liquid molecules bouncing back into liquid.

Some factors increase the rate of evaporationEvaporation is the change of a liquid into a gas at the surf... More namely:

• Increase in temperature: If we observe the wet clothes, we will notice that on a warm day, they dry faster than on a cold day. This is because more particles of the water have enough energyEnergy is the property of matter and radiation which is mani... to escape.
• Increase in surface area: Water in a puddle on the road will dry more quickly than water in a cup. This is because more water molecules in the puddle are close to the surface and escape in bigger number than in the cup.
• Air blowing across the surface: When a day is windy, the clothes dry faster than when it is quiet or you can dry your wet hand by getting them closer to the fan. This is because the moving air carries escaping water molecules away from the liquid, preventing them from bouncing back into the liquid as result of air pressureAir pressure is the pressure exerted by the atmosphere More over the liquid.
• Reduction of humidity: when air contains more water vapour, it is said to be very humid. Wet clothes will take longer to dry in very humid air because molecules in the water vapour return to the liquid almost at the same rate as water molecules escape from it.

During the evaporationEvaporation is the change of a liquid into a gas at the surf... More process, the molecules that escape from the liquid are the most energetic ones. The average kinetic energyEnergy is the property of matter and radiation which is mani... of those that remain is therefore reduced, and the temperature reduces. This is cooling by evaporationEvaporation is the change of a liquid into a gas at the surf... More.