Okay, I've been trying to figure out this question for almost a week now.
A constant temperature bath containing 5.00 L of water at 70.0 C was cooled by adding 0.500 kg of ice. Find the final temperature.
My confusion stems from the fact that there is no initial temperature for the ice. Do I assume that the ice is at 0 C and goes through a phase change? Do I use Q1 + Q2 = 0? HELP PLEASE.