posted by Anon on .
Which requires more energy: to raise 1 kg of liquid water from 0 to 100 degrees (Celsius) or to turn that water to steam after it hits 100 degrees? Assume the specific heat capacity of water is approximately independent of temperature.
Heating of the liquid from 0 to 100 C requires 100 cal/g. Evaporation requires 540 cal/g, more than five times as much heat.