[SOLVED] phase changes 1. The problem statement, all variables and given/known data A 40.0 g block of ice is cooled to -78oC. It is added to 560 g of water in an 80.0 g copper calorimeter at a temperature of 25oC. Determine the final temperature . If not all the ice melts, determine how much ice is left. 2. Relevant equations Q=mC∆T Q=mL (phase change) Q(lost)+ Q(gained)=0 3. The attempt at a solution energy to bring water to O degrees C Q=mC∆T =(.040kg)(4186J/KgC)(0-25C) =-4186J Energy to bring copper to 0 degrees C Q=mC∆T =(0.800kg)(386J/kgC)(0-25C) =-7720 Energy to bring ice to 0 Q=mC∆T =(0.040kg)(?)(0--78) =? is the specific heat of ice the same as water? energy phase change Q=mL =(.040kg)(?) is the latent heat of ice the same as the latent heat for freezing water? and then after finding all that how do i know if there is ice left?