Temperature affects the rate of evaporation. The higher the temperature, the more molecules move, enabling them to escape from the surface of a liquid. Fill two same-size glasses with 2oz of water.

Evaporation depends on the amount of water vapour present in the air (humidity). If the amount of water vapour present in the air is less, then evaporation is more.

The key factors that affect the rate of evaporation of a liquid are: Temperature: The greater the temperature of the liquid and its surroundings, the faster the rate of evaporation. Humidity of the surroundings: The greater the humidity of the atmosphere surrounding the water, the slower the rate of evaporation.

As temperature increases, rate of evaporation also increases. This is due to increasing kinetic energy of the surface molecules which leads them to free and become vapour. As surface area increases, rate of evaporation also increases.

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At 100% humidity, the partial pressure is equal to the vapor pressure, and no more water can enter the vapor phase. If the partial pressure is less than the vapor pressure, then evaporation will take place, as humidity is less than 100%.

Evaporation happens when a liquid turns into a gas. When liquid water reaches a low enough temperature, it freezes and becomes a solid—ice. When solid water is exposed to enough heat, it will melt and return to a liquid. As that liquid water is further heated, it evaporates and becomes a gas—water vapor.

Evaporation causes cooling because the process requires heat energy. The energy is taken away by the molecules when they convert from liquid into gas, and this causes cooling on the original surface.

Evaporation continues, but as condensation increases the apparent evaporation slows. But if you blow that humid layer of air away with a fan, replacing it with air that isn’t so saturated with recently evaporated water, the condensation rate stays low and the apparent evaporation rate increases.

Placing a pan of ice in front of a fan won’t be a very effective way to cool a small space. In operation, the ice will cool the air inside the bin and drop to a lower level; the water drip will saturate the filter media and make a swamp cooler.

Best Ways to Cool a House: Downstairs

1. Draw the Blinds. While natural light is great, too much of it can turn your home into a sauna during the summer months.
2. Avoid Using the Stove.
3. Unplug Appliances You’re Not Using.
4. Turn on Bathroom Fans.
5. Opt for Breezy Clothing.
6. Add Outdoor Shade.
7. Switch to No-Heat Lightbulbs.