A block of metal is heated electrically by a 65 W heater. If the temperature rises by 18°C in 12 min
Source: JAMB · 2023
A block of metal is heated electrically by a 65 W heater. If the temperature rises by 18°C in 12 minutes, the heat capacity of the metal
Explanation
Energy supplied = power × time = 65 W × (12 × 60 s) = 65 × 720 = 46 800 J.
Heat capacity = energy ÷ temperature rise = 46 800 ÷ 18 = 2600 JK⁻¹.
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