What energy will be released during the complete combustion of dry firewood weighing 20 kg?
| June 16, 2021 | education
m = 20 kg.
λ = 1 * 10 ^ 7 J / kg.
Q -?
The amount of heat Q that is released during the combustion of dry wood is determined by the formula: Q = λ * m, where λ is the specific heat of combustion of the substance, m is the mass of the substance that burned out.
We take the specific heat of combustion of dry firewood from the table of specific heat of combustion of substances: λ = 1 * 10 ^ 7 J / kg.
Q = 1 * 10 ^ 7 J / kg * 20 kg = 20 * 10 ^ 7 J.
Answer: when dry firewood is burned, Q = 20 * 10 ^ 7 J of thermal energy will be released.
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