A block of copper of mass 0.5 kg is heated from 20°C to 120°C. If the specific heat capacity of copper is 400 J/(kg·°C), what is the heat energy absorbed by the copper?

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Question

A block of copper of mass 0.5 kg is heated from 20°C to 120°C. If the specific heat capacity of copper is 400 J/(kg·°C), what is the heat energy absorbed by the copper?

Accepted Answer

20 000 J — Award 1 mark for correct calculation using Q = mcΔθ = 0.5 × 400 × (120 – 20) = 0.5 × 400 × 100 = 20 000 J. A is incorrect — uses mass of 0.25 kg or temperature change of 50°C. C is incorrect — uses final temperature instead of temperature change. D is incorrect — uses mass of 1 kg.

Answer

40 000 J

Answer

20 000 J

Answer

10 000 J

Answer

24 000 J

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