If 82 J of heat are added to a pure gold coin with a mass of 17 g , what is its temperature change? Specific heat capacity of gold is 0.128 J/g∘C. Express your answer using two significant figures.

Question

If 82 J of heat are added to a pure gold coin with a mass of 17 g , what is its temperature change? Specific heat capacity of gold is 0.128 J/g∘C.

Express your answer using two significant figures.

Answer 1

Q = mcΔT

ΔT = Q/mc

ΔT = (82 J)/(17 g x 0.128 J/g*^oC)

ΔT = 37.68 ^oC (without two significant figures)

ΔT = 38 ^oC (with two significant figures)