Chem
posted by Chase .
Calculate the final temperature when a 16.2 gram sample of ice at 0oC is placed into a styrofoam cup containing 128 grams of water at 79.0 oC. Assume that there is no loss or gain of heat from the surroundings.
Heat of fusion of ice = 333 Jg1
Specific heat of water = 4.184 JK1g1
Final temperature = oC
Calculate the entropy change that occurs during this process.
Entropy change = JK1

heat to melt ice + heat to raise T of melted ice to final T + heat lost by water initially at 79 C.
[mass ice x heat fusion] + [mass melted ice x specific heat H2O x (TfinalTinitial)] + [mass warm water x specific heat H2O x (TfinalTinitial)] = 0
Solve for Tfinal.