The rate of evaporation increases with an increase in temperature because temperature affects the kinetic energy of the water molecules. As the temperature increases, the average kinetic energy of the water molecules increases, causing them to move faster and collide with each other more frequently and with greater force. This increased kinetic energy also allows more water molecules to overcome the attractive forces of other molecules and escape into the air as water vapor.
When the temperature is low, the water molecules move more slowly and collide with each other less frequently and with less force. This makes it more difficult for the water molecules to escape into the air as water vapor, and the rate of evaporation is slower.
Additionally, an increase in temperature reduces the relative humidity of the air, which makes it easier for water molecules to escape from the surface of the liquid and into the air. This is because the air can hold more water vapor at higher temperatures before becoming saturated.
Therefore, the rate of evaporation is directly proportional to the temperature, and an increase in temperature leads to an increase in the rate of evaporation.