With complete combustion of 2.5 kg of coal is released .. J of energy?
| June 16, 2021 | education
Initial data: m (mass of burnt coal) = 2.5 kg.
Reference values: q (specific heat of combustion of coal) = 27 MJ / kg (27 * 10 ^ 6 J / kg).
The amount of thermal energy that can be released during the complete combustion of 2.5 kg of coal is determined by the formula: Q = q * m.
Calculation: Q = 27 * 10 ^ 6 * 2.5 = 67.5 * 10 ^ 6 J (67.5 MJ).
Answer: With the complete combustion of 2.5 kg of coal, 67.5 MJ of thermal energy will be released.
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