How do you calculate the latent heat of vaporization of water?

Latent heat calculation The specific latent heat is different for solid to liquid transition and liquid to gas transition. For example, if we want to turn 20 g of ice into water we need Q = 20 g * 334 kJ/kg = 6680 J of energy. To turn the same amount of water into vapor we need Q = 45294 J .

What is the latent heat of vaporization for water?

about 2,260 kJ/kg
The heat of vaporization of water is about 2,260 kJ/kg, which is equal to 40.8 kJ/mol. The vaporization is the opposite process of condensation. The heat of condensation is defined as the heat released when one mole of the substance condenses at its boiling point under standard pressure.

What is the heat of vaporization for 1 gram of h2o?

As a result of the network of hydrogen bonding present between water molecules, a high input of energy is required to transform one gram of liquid water into water vapor, an energy requirement called the heat of vaporization. Water has a heat of vaporization value of 40.65 kJ/mol.

What is the formula for specific latent heat of vaporization?

The specific latent heat (L) of a material… is a measure of the heat energy (Q) per mass (m) released or absorbed during a phase change. is defined through the formula Q = mL.

How much is latent heat of vaporization?

For the water substance at 1 atm and 100 °C (the boiling point of water at 1 atm), the latent heat of vaporization is 2.25 ÷ 106 J kg21. The latent heat of condensation has the same value as the latent heat of vaporization, but heat is released in the change in phase from vapor to liquid.

Why is the latent heat of vaporization of water high?

The energy required to completely separate the molecules, moving from liquid to gas, is much greater that if you were just to reduce their separation, solid to liquid. Hence the reason why the latent heat of vaporization is greater that the latent heat of fusion.

What is water vaporization?

Heat of vaporization of water That is, water has a high heat of vaporization, the amount of energy needed to change one gram of a liquid substance to a gas at constant temperature. As water molecules evaporate, the surface they evaporate from gets cooler, a process called evaporative cooling.

What is the value of latent heat of vaporization of water in Cal G?

540 cal/g
For example, the latent heat of vaporization of water is 540 cal/g and the latent heat of freezing of water is 80 cal/g.

What is the value of latent heat of vaporization of water in J kg?

latent heat of vaporisation – the amount of energy needed to evaporate or condense the material at its boiling point….Specific latent heat.

What is the value of latent heat of vaporization of water class 9?

Latent Heat of Vaporization (liquid to gas change): The latent heat of vaporization of water is 22.5×105 joules per kilogram (or 22.5×105 j/kg).

How do you calculate latent heat?

Latent heat calculation. All we need to know to compute the latent heat is the amount of substance and its specific latent heat. The formula is: Q = m * L, where. m [kg] is the mass of the body, L [kJ/kg] is the specific latent heat, Q [J] is the heat absorbed or released depending on the direction of the transition.

What is the equation of latent heat?

Answer:The latent heat is given by the equation: Q= m L substituting the value of m, and the specific latent heat Q= 0.5 Kg * 334 KJ/Kg = 167 KJ = 167000 J This is the amount of energy released when water is melting at 0 °C.

How to you calculate the heat of vaporization?

Heat of Vaporization Formula A very basic equation to calculate the heat of vaporization is: ΔH vap = H vapor – H liquid This calculates the difference in internal energy of the vapor phase compared to the liquid phase.

How does one calculate heat of vaporization?

A very basic equation to calculate the heat of vaporization is: ΔH vap = H vapor – H liquid This calculates the difference in internal energy of the vapor phase compared to the liquid phase.