What do you understand by the statement ‘The value of latent heat of vapourisation of water is 22.6 × 105 J/kg’?
What do you understand by the statement ‘The value of latent heat of vapourisation of water is 22.6 × 105 J/kg’?
Concept: The value of latent heat of vapourisation of water
Step 1: Definition: The amount of heat energy required to change unit mass of water into vapour at boiling point of water under
the atmospheric pressure without any change in the temperature.
Step 2:Explanation: 1)The value of latent heat of vapourisation of water is 22.6 x 105 J/kg. 2)It means that 22.6 x 105 J of heat is required to change 1 kilogram of water at its boiling
point of 100°C into steam at the same temperature of 100°C.
3)Hence, the energy of 1kg of steam at 100°C is 22.6 x 105 J/kg.
Concept: The value of latent heat of vapourisation of water
Step 1: Definition: The amount of heat energy required to change unit mass of water into vapour at boiling point of water under
the atmospheric pressure without any change in the temperature.
Step 2:Explanation: 1)The value of latent heat of vapourisation of water is 22.6 x 105 J/kg. 2)It means that 22.6 x 105 J of heat is required to change 1 kilogram of water at its boiling
point of 100°C into steam at the same temperature of 100°C.
3)Hence, the energy of 1kg of steam at 100°C is 22.6 x 105 J/kg.
