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A Level Specific Heat Capacity Questions

Q10. In an experiment to measure the temperature of the flame of a Bunsen burner, a lump of copper of mass 0.12 kg is heated in the flame for several minutes. The copper is then transferred quickly to a beaker, of negligible heat capacity, containing 0.45 kg of water, and the temperature rise of the water measured.

( specific heat capacity of water = 4200 J kg - 1 K - 1

specific heat capacity of copper = 390 J kg - 1 K - 1)

(a) If the temperature of the water rises from 15 °C to 35 °C, calculate the thermal energy gained by the water.

(2 marks)

(b)

(i) State the thermal energy lost by the copper, assuming no heat is lost during its transfer.

(ii) Calculate the fall in temperature of the copper.

(iii) Hence calculate the temperature reached by the copper while in the flame.

(4 marks)

(Total 6 marks)