A 50.0 g sample of liquid water at 25.0 °C is mixed with 17.0 g of water at 83.0 °C. The final temperature of the water is ________°C.
B) The specific heat capacity of liquid mercury is 0.14 J g^(-1) K^(-1). How many joules of heat are needed to raise the temperature of 4.00 g of mercury from 19.0°C to 39.5°C?