Correct Option
Statement 3 is correct.
- In an air-conditioner, the evaporator coils are positioned inside the room. These coils absorb heat from the room air, leading to its cooling.
- The refrigerant, having absorbed this heat, then flows to the condenser coils, which are located outside the conditioned space.
- At the condenser coils, the absorbed heat is released or rejected to the external environment, completing the refrigeration cycle.
Incorrect Options
Statement 1 is incorrect.
- Steam at 100°C contains a greater amount of heat energy than boiling water at 100°C.
- This additional energy is known as the latent heat of vaporization, which is absorbed during the phase transition from liquid water to steam at a constant temperature.
- Consequently, steam at 100°C possesses a higher internal energy content compared to boiling water at the same temperature.
Statement 2 is incorrect.
- The latent heat of fusion of ice is approximately 334 kJ/kg.
- The latent heat of vaporization of water is approximately 2260 kJ/kg.
- These values are not equal; the energy required for vaporization is significantly higher than that for fusion.
Options (a), (b), and (c) are incorrect as they include one or both of the factually inaccurate statements 1 and 2. Only statement 3 is correct.