With the complete combustion of dry wood, 50,000 kJ of energy was released. How much firewood was burned?
| May 29, 2021 | education
Given:
Q = 50,000 kiloJoules = 5 * 10 ^ 7 Joules – the amount of heat released during the combustion of firewood;
c = 1 * 10 ^ 7 Joule / kilogram – specific heat of combustion of firewood.
It is required to determine the mass of burnt firewood m (kilogram).
Q = c * m, hence:
m = Q / c = 5 * 10 ^ 7/1 * 10 ^ 7 = 5 kilograms.
Answer: the mass of burnt firewood is 5 kilograms.
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