A 12-inch diameter ball of pure cobalt metal at 225°C was placed in 10.0 gal of water at 15.0 °C. What is the final temperature of the water? Assume no heat is lost to the surroundings. (sp. ht for cobalt is 0.421 J/gºC,
density of cobalt = 8.832 g/cm°, 1 gal = 3.785 L, V (sphere) = 4/3 tr?
169°C
b. 120°C
69.3°C
22.5°C
45.6°C
C.
d
e