1. The problem statement, all variables and given/known data 5 kg of water at 60 degrees are put in contact with 1 kg of ice at 0 degrees and are thermally isolated from everything else. The latent heat of ice is 3.3x105 J/kg. What is the change of entropy of the universe when 100J of energy are transferred from the water to the ice? 2. Relevant equations Q=mcΔT Q=ml ΔS=Q/T 3. The attempt at a solution Qi (ice -> water) + Qi (water -> Tf) -Qw (water -> Tf) = 100 ml + mcΔT - mcΔT = 100J My plan was to use this set of equations to solve for the T value then plug that into the equation for entropy generation but once I solve for Tf I get a value of 95K which doesn't make sense since the Tf should e somewhere in between 273K and 333K. I think my approach to the problem might be flawed and would appreciate some guidance!