a. State two differences between evaporation of water and boiling of water.

b. The specific latent heat of vaporization of water is 2260 kJ/kg. Explain why this energy is needed to boil water and why the temperature of the water does not change during the boiling.

c. A laboratory determination of the specific latent heat of vaporization of water uses a 120 W heater to keep water boiling at its boiling point. Water is turned into steam at the rate of 0.050 g/s. Calculate the value of the specific latent heat of vaporization obtained from this experiment. Show your working.