Specific Latent Heat of Vaporization

Heat is dissipated away from the body due to the high latent heat of vaporization of water. The heat absorbed or discharged as matter disintegrates changing state from fluid to gas at a constant temperature is known as latent heat of vaporization.

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Latent Heat of Vaporization Formula.

. The enthalpy of vaporization is a function of the pressure at which that transformation takes place. Hence we can conclude that The specific latent heat L of a material. The latent heat of vaporization H vap also known as the enthalpy of vaporization or evaporation is the amount of energy enthalpy that must be added to a liquid substance to transform a given quantity of the substance into a gas.

The enthalpy of vaporization symbol H vap also known as the latent heat of vaporization or heat of evaporation is the amount of energy that must be added to a liquid substance to transform a quantity of that substance into a gasThe enthalpy of vaporization is a function of the pressure at which that transformation takes place. The latent heat of water at 0 degree Celsius for fusion is nearest to 334 joules per gram or 797 calories per gram. It is a measurement of the amount of heat energy Q emitted or absorbed.

Ice has a smaller specific heat than the surrounding air in a freezer. Although sensible heat is often called latent heat it isnt a constant-temperature situation nor is a phase change involved. Lv for vaporization and Lf for fusion.

Specific latent heat is defined as the amount of heat required for transition of one phase completely to another phase for a unit mass. Hence it absorbs more energy from the ice-cream mixture. All we need to know to compute the latent heat is the amount of substance and its specific latent heat.

So the latent heat of vaporization of water is 2257 kJkg. Specific heat capacity and heat of vaporization of water. Q m L.

Latent Heat of Vaporization. M kg is the mass of the body L kJkg is the specific latent heat Q kJ is the heat absorbed or released depending on the direction of the transition. NCERT Notes Class 12th Physics.

The specific latent heat is different for solid to liquid transition and liquid to gas. To solve part b we use the equation for heat required for vaporization along with the latent heat of vaporization of water from the previous table. Latent heat of vaporization 1 atm boiling point 13712 kJkg Critical temperature 1324 C Critical pressure 1128 bar Gas Phase Gas density 1 atm at boiling point 086 kgm3 Gas density 1 atm at 15C 73 kgm3 Compressibility Z 1 atm at 15C 9929 Specific gravity air1 1 atm at 20C 597 Specific volume 1 atm.

The latent heat of vaporization is the heat absorbed or released when matter vaporizes changing phase from liquid to gas phase at a constant temperature. NCERT Notes Class 11th Physics. NCERT Notes For All Subjects.

The heat of vaporization diminishes. The enthalpy of vaporization is often. L is specific latent heat for a particular matter kJ kg-1.

Solution to b The energy to vaporize 1000 kg of liquid. However its much harder.

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