A 140-G Block of Copper Is Taken from a Kiln

Multiple Choice

A 140-g block of copper is taken from a kiln and quickly placed into a beaker of negligible heat capacity containing 290 g of water.The water temperature rises from 6.8°C to 26.8°C.Given c_Cu = 0.10 cal/g⋅°C,and c_water = 1.00 cal/g⋅°C,what was the temperature of the kiln?

A) 720°C
B) 387°C
C) 682°C
D) 441°C
E) 68.2°C