Lecture Example: At Your Desk in Group CH204.184 J g'K-1 145 g sample of copper metal at 100.0°C is placed into 250.0 g of water at 25.0 °C in a calorimeter. When the system reaches thermal equilibrium, the temperature of the water in the calorimeter is 28.8°C. Assume the calorimeter is perfectly insulated . What is the specific heat of copper? A 0.385 J/gK . What is the amount of heat for a 100.0 g piece of copper? 38.5 J/°C