How is latent heat related to evaporation and condensation?
Heat is taken from your skin to evaporate the water on your body. Evaporation is a cooling process. Latent heat of condensation is energy released when water vapor condenses to form liquid droplets. An identical amount of calories (about 600 cal/g) is released in this process as was needed in the evaporation process.
What is the cooling effect of evaporation?
The necessary heat of evaporation is extracted from the sweat itself, which leads to a heat transfer from the liquid into the gaseous state. This results in a cooling effect (called evaporative cooling) that helps to maintain body temperature and cools the body down when it gets too hot.
How does latent heat affect evaporation?
Latent heat is energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process. If the vapor then condenses to a liquid on a surface, then the vapor’s latent energy absorbed during evaporation is released as the liquid’s sensible heat onto the surface.
What is the latent heat of condensation of water?
about 2,260 kJ/kg
It is expressed as kg/mol or kJ/kg. The energy released in this process is called heat of condensation. The heat of condensation of water is about 2,260 kJ/kg, which is equal to 40.8 kJ/mol.
What is latent heat of condensation Upsc?
So latent heat of condensation is the heat released when gases turn into liquid.
Does condensation heat or cool the air?
Condensation: A Warming Process While condensation does cool the air inside of the air parcel, in order for that cooling to occur, that parcel must release heat into the surrounding environment. Thus, when speaking about the effect of condensation on the overall atmosphere, it warms it.
Why cooling is caused by evaporation explain?
It is because the water molecules absorb the heat of our body and convert into gas molecules. The heat lost from our skin makes us feel cooler. If a liquid evaporates faster, it will take up the heat from our skin at a faster rate making us feel colder than the other liquids.
How does evaporation differ from cooling?
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.
What is specific latent heat of evaporation?
The specific latent heat of a substance is the amount of energy needed to change the state of 1 kg of the substance without changing its temperature. Each substance has two specific latent heats: latent heat of vaporisation (the amount of energy needed to evaporate or condense the substance at its boiling point)
What is latent heat How is latent heat an important source of atmospheric energy?
When the molecules return to a liquid state the latent heat is released as sensible heat (heat you can feel basically). It is important in the atmosphere because it is the primary factor involved in the formation of convective clouds and the stability/instability of the atmosphere.
What is meant by latent heat of evaporation?
The latent heat of evaporation is the heat released or absorbed when matter disintegrates, phase changes from liquid to gas or changing stage from fluid to gas stage at a consistent temperature.it is also called latent heat of evaporation.
How does adiabatic cooling help in the process of condensation?
Adiabatic change refers to the change in temperature with pressure. On descent through atmosphere, the lower layers are compressed under atmospheric pressure. As a result, the temperature increases. This expansion reduces the temperature and aids condensation of water vapour.