A 141.1 g piece of copper (specific heat 0.380 J/g･ °C) is heated and then placed into 400.0 g of water initially at 20.7 °C. The water increases in temperature to a final temperature of 22.2 °C. What is the initial temperature (in °C) of the copper? (The specific heat of water is 4.184 J/g･ °C).
