not understanding how to do this.

A certain storm cloud has a potential of 1.00x10^8 V relative to the tree. If during a lightning storm, 50C of a charge is transfered through this potential differnce and 1.00% of the energy is absorbed by the tree, how much sap can be boiled away? Model the sap as water initially at 30 deg C. Water has a specific heat of 4186 J/kg *Celcius, a boliing poingt of 100 deg C, and latent heat of vaporization of 2.26x10^6J/kg.