1. The problem statement, all variables and given/known data The specific latent heat of vaporization of water at 28[tex]\circ[/tex]C is 2.3 x 106JKg-1. It has been estimated that 1.2 x 1012 m3 of water is evaporated per day from the Earth's surface. Given that the density of water is 1 x 103 kgm-3calculate the energy required to evaporate this volume of water. 3. The attempt at a solution I'm thinking since the water is just evaporating and not boiling, the energy needed would be the heat required to just evaporate the water: EH=mwater x latent heat =2.67 x 1018J But this is wrong. I realize I have not used the density of water but I do not know how to apply it. Is this question asking me to find the increase in internal energy? In any case the volume of water is 1.02 x 109m3.