The needed heat is 2 258 kJ.
Perspiration coats the outside of the skin with moisture (water). The water evaporates. Evaporation requires heat to be absorbed by the water (the latent heat of vaporization). Heat is removed from the body surface to provide the water with the latent heat of vaporization.
Water.
When your body perspires, it is coating your body with sweat. When it is really hot out, the sweat evaporates, cooling your body by removing the sweat.
Evaporation of water from the skin is a cooling process because it requires heat energy from the skin to convert liquid water into water vapor. This heat energy is drawn from the skin's surface, resulting in a cooling sensation.
When you heat water, it evaporates into water vapor, which is a gas form of water. This process occurs when the water reaches its boiling point and changes from a liquid to a gas.
Heat
The suns heat evaporates water.
This change of phase (from a liquid to a gas) requires heat, called the "latent heat of condensation". When water evaporates, it removes heat, lowering the temperature of the surface. For both water and land surface, most of this heat energy comes from the surface, not from the air.
When water evaporates, heat from the surroundings is absorbed to break the bonds between water molecules, turning liquid water into water vapor. This heat energy is stored in the water vapor as latent heat, increasing its kinetic energy.
The water heat of vaporization is 40,65 kJ/mol.
it evaporates
Water evaporates from heat or pressure and turns into water vapor.