With the complete combustion of firewood, 50 MJ of energy was released. How much firewood was burned?
| August 8, 2021 | education
Given:
Q = 50 MJ = 50 * 10 ^ 6 Joules – the energy released during the complete combustion of firewood;
q = 10 MJ = 10 ^ 7 J / kg is the specific heat of combustion of firewood.
It is required to determine m (kilogram) – the mass of burnt firewood.
Q = q * m, hence:
m = Q / q = 50 * 10 ^ 6/10 ^ 7 = 5 * 10 ^ 7/10 ^ 7 = 5 kilograms.
Answer: the mass of burnt firewood is 5 kilograms.
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