Solve the following calorimetry problem (show all work). A solid substance with a mass of 200g is at its melting point temp in a calorimeter. While the substance changes from a solid to a liquid at the same temp, the 400-g mass of water in the calorimeter goes from an initial temp of 80 C to a final temp of 30 C.
A) How much heat did the water lose while the substance melted?
B) What is the heat of fusion of the substance that melted?