A 50 gram sample of liquid water at 25 degrees C is mixed with 29 grams of water at 45 degrees C. The final temperature of the water is...?

Answer 1

heat gained by cool H2O + heat lost by warm H2O = 0

[mass cool H2O x specific heat H2O x (Tfinal-Tintial)] + [mass warm water x specific heat H2O x (Tfinal-Tintial)] = 0
Substitute and solve for Tf

Answer 2

32. C