Question

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°)

Answer 1

Heat generated by the current = 1547.89 J

Step-by-step 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