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9 November, 17:52

An electric current heats a 221 g (0.221 kg) copper wire from 20.0 °C to 38.0 °C. How much heat was generated by the current? (Ccopper = 0.093 kcal/kgC°)

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  1. 9 November, 20:44
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    Heat generated by the current = 1547.89 J

    Explanation:

    We have equation for heat energy H = mCΔT

    Mass of copper = 0.221 kg

    Specific heat of copper = 0.093 kcal/kgC° = 389.112 J/kgC°

    ΔT = 38 - 20 = 18°C

    Substituting in H = mCΔT

    H = 0.221 x 389.112 x 18 = 1547.89 J

    Heat generated by the current = 1547.89 J
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