If a 30g piece of ice at -5C is immersed in 125mL of water at 25C in an insulated container...

A. Determine the final temperature and final composition of the system

B. Determine the entropy changes of the ice and the water and the overall entropy change of this process.

[mass ice x specific heat ice x (Tfinal-Tinitial)] + [mass ice x heat fusion] + [mass ice x specific heat H2O x (Tfinal-Tinitial)] + [mass H2O x specific heat H2O x (Tfinal-Tinitial)] = 0

The first Tf is 0 and the first Ti is -5 so that term is 0-(-5) = _5.
The second Tf is unknown; second Ti is 0.
The third Tf is unknown; third Ti is 25.