2. A 50.0g piece of brass with a specific heat of 0.380 J/g C was heated to an unspecified temperature and then dropped into 30.0g of water initially at 21.4C. The final temperature of the brass mixture was 32.8C. Given that the specific heat of water for this temperature range is 4.184 J/g C what was the initial temperature of the brass?

When 182 g of gold at some temperature is placed in 25 mL of water at 25.0 ^oC the final temperature of the mixture is 28.3 ^oC. What was the initial temperature of the gold? (C_Au = 0.128 J/gK)

40. 561.2 J of heat was added to 8.00 g of water. The final temperature of the water was measured to be 64.2°C. What was the initial temperature of the water? (specific heat capacity of water = 4.184 J/g°C)