What is latent heat of vapourization?

Answer 1

The latent heat of vaporization is what is commonly referred to as boiling. This is the amount of energy require to change from a state of liquid to vapor.

Answer 2

Latent heat of vapourisation is the amount of energy absorbed by a substance when it changes from a liquid to a gas without any change in temperature. It can be calculated by using the equation Lv=E/m where Lv is the latent heat of vapourisation, E is the energy and m is the mass of the substance. Similarly the latent heat of fusion (Lf) is the amount of energy to change a solid into a liquid.

Answer 3

The latent heat of vaporisation is the energy required to convert liquid to gas. It is expressed in joules per gram and varies from substance to substance. The energy is required to enable the molecules of liquid to overcome the molecular attraction between molecules and break free to become free-moving molecules of gas.

You can see this latent heat happening with boiling water. As it boils the water stays at 100 Degrees C. despite the fact that there is a flame heating it. The energy of that extra heat input is being taken away from the pot by the escaping water vapour and is contained in that vapour.

===========================================When one milliliter (ml, or cc, or gram) of water evaporates, it needs to absorb 'X' amount of energy from its surroundings so as to be able to increase its Kinetic Energy, which then allows the change in state from a liquid to a vapor to occur.

Therefore, the latent heat of vaporization is the amount of Heat Energy that is required to raise one gram of water from the liquid state to the gaseous state.

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The Important thing to note about the latent heat of Vaporisation is that it is given back to the environment when the vapour condenses back to a liquid.

Answer 4

The latent heat of vaporization for water is 539.6 cal/gram.

The only thing can be cosidered is the total amount of heat added to water to vaporize at what atmospheric pressure.it may change the latent heat of vaporization.

2250 kJ/Kg

Answer 5

That really depends of which substance is evaporating. However, for water it is 2264.7 kj/kg. It is the amount of energy required in order to change a liquid at it boiling point into a gas at the same temperature. Notice there is no change in temperature, just a change is state.

Answer 6

My Dick In Yo Mouth

Answer 7

2260 kJ/kg (Wikipedia)

Answer 8

2250 J/Kg