Answer to Question #63311 in Molecular Physics | Thermodynamics for MRB

Question

Q The specific latent heat of fusion of ice is 334000 j/kg. What does this mean?
Q At 100c water has a specific latent heat of vaporization of 2260 000 j/kg. What does this mean? How much thermal energy would be needed to change 2 kg of water at 100c into steam at the same temperature? How much thermal energy would be needed to change 10 kg?
Q Explain the terms of Kinetic theory why
a) Thermal energy is needed to turn a liquid into a gas.
b) Evaporation produces cooling.

Q An electric kettle has a power rating of 2.1 kw. The kettle is filled with 1.5kg of water at a temperature of 20c. How long after the kettle is switched on will the water start to boil?