What is the mass of pine firewood, if 127.4 MJ of heat is obtained with their complete combustion?
| February 7, 2021 | education
To find the value of the mass of burned dry pine wood, we will use the formula: Q = qсд * m, from where we express: m = Q / qсд.
Constants and variables: Q – received heat (Q = 127.4 MJ); qсд – specific heat of combustion of dry pine wood (qсд = 12.5 MJ / kg).
Calculation: m = Q / qsd = 127.4 / 12.5 = 10.192 kg.
Answer: To obtain 127.4 MJ of heat, 10.192 kg of dry pine firewood was burned.
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