College Physics 10th Edition by Raymond Serway,Chris Vuille

Exercise 39

A certain storm cloud has a potential difference of 1.00 × 10 8 V relative to a tree. If, during a lightning storm, 50.0 C of charge is transferred through this potential difference and 1.00% of the energy is absorbed by the tree, how much water (sap in the tree) initially at 30.08C can be boiled away Water has a specific heat of 4 186 J/kg 8C, a boiling point of 1008C, and a heat of vaporization of 2.26 × 10 6 J/kg.