A 030-Kg Lead Ball Is Heated to 90

Multiple Choice

A 0.30-kg lead ball is heated to 90.0 °C and dropped into an ideal calorimeter containing 0.50 kg of water initially at 20.0 °C. What is the final equilibrium temperature of the lead ball? The specific heat capacity of lead is 128 J/(kg · C°) ; and the specific heat of water is 4186 J/(kg · C°) .

A) 84.8 °C
B) 20.8 °C
C) 21.3 °C
D) 27.8 °C
E) 32.1 °C