Question

How much heat energy must be added to a 7.6- cm -diameter copper sphere to raise its temperature from -50 ∘C to 190 ∘C ?

Answer 1

V = 4/3 π R^3 = 4/3 π 3.8^3 = 230 cm^3

M = ρ V = 8.89 g/cm^3 * 230 cm^3 = 2045 g

ΔQ = C M ΔT = .093 cal /g deg C * 2045 g * 240 deg C

ΔQ = 45,640 cal