monica12mrp4oty1 monica12mrp4oty1

25-02-2018
Chemistry

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Calculate the amount of heat required to heat a 3.2kg gold bar from 29Celsius to 64Celsius. Specific heat capacity of gold is 0.128J/g Celsius .

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Dejanras Dejanras

06-03-2018

Answer is: the amount of heat required to heat the gold is 14336 J.
m(Au) = 3,2 kg · 1000 g/kg = 3200 g.
ΔT = 64°C - 29°C = 35°C.
C = 0,128 J/g·°C.
Q = m(Au) · ΔT · C.
Q = 3200 g · 35°C · 0,128 J/g·°C.
Q = 14336 J = 14,336 kJ.

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