Question

A copper rod that has a mass of 200.0 g has an initial temperature of 20.0°C and is heated to 40.0°C. If 1,540 J of heat are needed to heat the rod, what is the specific heat of copper?
Use q equals m C subscript p Delta T..
0.0130 J/(gi°C)
0.0649 J/(gi°C)
0.193 J/(gi°C)
0.385 J/(gi°C)

Answer 1

Use Cp = q / (m ΔT).

m = 200.0 g, ΔT = 40.0 − 20.0 = 20.0 °C, q = 1540 J

Cp = 1540 / (200 × 20) = 1540 / 4000 = 0.385 J/(g·°C).

Answer: 0.385 J/(g·°C).