Give the values for the latent heat of vaporization and latent heat of fusion of water?
Give the values for the latent heat of vaporization and latent heat of fusion of water?
ANSWER:- The latent heat of vaporization is The Heat required to convert unit mass of liquid water (say 1kg) into steam or vapour. Please note that the process of vaporization happen at constant temperature ie 100 degree Celsius.
If the temperature rises due to the heat supplied then this will be considered as specific heat.
1 calorie = 4.186 J. Latent heat of vaporization of water = 539 cal/g =2256 kJ/kg. Latent heat of fusion of water = 79.5 cal/g = 333 kJ/kg. Specific heat of water = 1 cal/g = 4.19 kJ/kg.
Similarly, while ice melts, it remains at 0 °C (32 °F), and the liquid water that is formed with the latent heat of fusion is also at 0 °C. The heat of fusion for water at 0 °C is approximately 334 joules (79.7 calories) per gram, and the heat of vaporization at 100 °C is about 2,230 joules (533 calories) per gram.
Hope it makes you clear .
Thank you.
The latent heat of vaporization is The Heat required to convert unit mass of liquid water (say 1kg) into steam or vapour. Please note that the process of vaporization happen at constant temperature ie 100 degree Celsius.
If the temperature rises due to the heat supplied then this will be considered as specific heat.
1 calorie = 4.186 J. Latent heat of vaporization of water = 539 cal/g =2256 kJ/kg. Latent heat of fusion of water = 79.5 cal/g = 333 kJ/kg. Specific heat of water = 1 cal/g = 4.19 kJ/kg.
Similarly, while ice melts, it remains at 0 °C (32 °F), and the liquid water that is formed with the latent heat of fusion is also at 0 °C. The heat of fusion for water at 0 °C is approximately 334 joules (79.7 calories) per gram, and the heat of vaporization at 100 °C is about 2,230 joules (533 calories) per gram.
Hope it makes you clear .
Thank you.
