A piece of iron of mass 2.05 kg is removed from a furnace where its temperature is 822°C and is quickly placed in an insulated copper can containing 2.81] kg of water. The copper can has a mass of 7.4 kg, and both it and the water it contains are originally at a temperature of 10°C. Calculate the final temperature of the system, assuming no thermal energy is transferred to the surroundings. Use the following specific heats: 4186 J/kg - C° (water), 470 J/kg - C° (iron) and 390 J/kg - Cº (copper).

A piece of iron of mass 2.05 kg is removed from a furnace where its temperature is 822°C and is quickly placed in an insulated copper can containing 2.81] kg of water. The copper can has a mass of 7.4 kg, and both it and the water it contains are originally at a temperature of 10°C. Calculate the final temperature of the system, assuming no thermal energy is transferred to the surroundings. Use the following specific heats: 4186 J/kg - C° (water), 470 J/kg - C° (iron) and 390 J/kg - Cº (copper).