With the complete combustion of dry wood, 500 MJ of energy was released. What was the mass of the burnt wood?
| June 20, 2021 | education
To calculate the mass of burnt firewood, we apply the formula: qсд * m and m = Q / qсд.
Variables and constants: Q – released thermal energy (Q = 500 MJ = 500 * 10 ^ 6 J); qсд – specific heat of combustion of dry wood (qсд = 1 * 10 ^ 7 J / kg).
Let’s perform the calculation: m = Q / qsd = 500 * 10 ^ 6 / (1 * 10 ^ 7) = 50 kg.
Answer: 50 kilograms of firewood burned out.
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