The human body obtains?

Question

The human body obtains 970 KJ of energy from a candy bar.
If this energy were used to vaporize water at 100.0 C , how much water (in liters) could be vaporized? (Assume the density of water is 1.00g/mL .)

Answer 1

Since 1g = 1mL, 1kg = 1L

The Heat of Vaporization of Water = 2261 J/g = 2261 kJ/kg = 2261kJ/L

970 / 2261 = 0.429 L