We have to determine how many liters of water at 100 °C can be evaporated by absorption of 950 kJ of heat.
The amount of heat required for a substance to evaporate at its boiling point is given by this formula:
qvap = amount of heat required for evaporation
m = mass of substance
ΔHvap = latent heat of vaporization
The human body obtains 950 kJ of energy from a candy bar.
If this energy were used to vaporize water at 100.0 oC, how much water (in liters) could be vaporized? (Assume the density of water is 1.00 g/mL.)