Question

Latent heat of vaporisation of water is

• A. $18kJ/kg$
• B. $22.5\times {10}^{2}kJ/kg$
• C. $3.34\times {10}^{5}kJ/kg$
• D. Zero

Answer 1

The correct option is B

$22.5\times {10}^{2}kJ/kg$

1. The latent heat of vaporization or evaporation is the heat energy required to convert 1 kg liquid into vapour state without a change in temperature.
2. Latent heat of vaporisation of water is $22.5\times {10}^{2}kJ/kg$.

Thus, option (b) is correct. Latent heat of vaporisation of water is $22.5\times {10}^{2}kJ/kg$.