A Styrofoam Container Used as a Esky Contains a Block $\degree$

Short Answer

A styrofoam container used as a Esky contains a block of ice at 0 $\degree$ C. If 225 grams of ice melts in 1 hour, how much heat energy per second is passing through the walls of the container? (The heat of fusion of ice is 3.33 * 105 J/kg).