Q. Consider the following statements:

1. Steam at 100° C contains more heat than boiling water at 100° C due to the latent heat of vaporization.
2. The latent heat of fusion of ice is significantly less than the latent heat of vaporization of water.
3. In an air-conditioner, heat is extracted from the indoor air at the evaporator coils and is released outside through the condenser coils.

Which of the above statements is/are correct?
Answer: All of the above
Notes: Steam at 100° C has more heat than boiling water at the same temperature, since steam contains the latent heat of vaporization. The latent heat of fusion of ice (334 J/g) is much less than the latent heat of vaporization of water (2230 J/g). Air-conditioners absorb heat from the air via evaporator coils and expel it outside via condenser coils.