Consider the following statements: 1. 1. Steam at 100° C and boiling water at 100° С contain same amount of heat. 2. 2. Latent heat of fusion of ice is equal to the latent heat of vaporization of water. 3. 3. In an air-conditioned, heat is extracted from the room air at the evaporator coils and is rejected out at the condenser coils. Which of these statements is/are correct?

1 Statement 1 is incorrect. Steam at 100° C contains significantly more heat energy than boiling water at 100° С. The additional heat in steam is the latent heat of vaporization, which is the energy required to change the state from liquid (water) to gas (steam) at the same temperature. 2 Statement 2 is incorrect. The latent heat of fusion of ice (energy required to melt ice to water at 0°C, approx. 334 J/g) is much smaller than the latent heat of vaporization of water (energy required to vaporize water to steam at 100°C, approx. 2260 J/g). They are not equal. 3 Statement 3 is correct. In an air-conditioner (operating in cooling mode), the refrigerant absorbs heat from the room air at the evaporator coils (causing the air to cool) and releases this heat (plus the heat from the compressor work) to the outside environment at the condenser coils.