1. a copper puece of mass 140g and of temperature 240 degree is placed into 360g of water at temperature 25 degree. Find the final equilibruim temperature. Neglet the heat losses to the environment.
2. 0.15 kg of ice initially at -10 degree is mixed with 0.48kg of water initially at 60 degree. Neglet the heat losses to the environment. Find the fianl temperature.