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Question
Calculate the amount of heat energy required to raise the temperature of 200 g of copper from 20°C to 70°C. Specific heat capacity of copper = 390 J kg-1 K-1.
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Solution
Mass of copper m = 200 g
= `200/1000`
= `2/10` kg
Rise in temperature Δ T = (70 - 20) = 50°C
Special heat capacity of copper = 390 J kg-1K-1
Amount of heat energy required Q = mc ΔT
Q = `2/10 xx 390 xx 50`
= 3900 J
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