Dry firewood with a mass of 0.44 tons, or will oil with a mass of 100 kg release more heat?
| April 29, 2021 | education
md = 0.44 t = 440 kg.
mn = 100 kg.
qd = 1 * 10 ^ 7 J / kg.
qн = 4.4 * 10 ^ 7 J / kg.
Qd -?
Qн -?
The amount of thermal energy Q, which is released during fuel combustion, is determined by the formula: Q = q * m, where q is the specific heat of combustion of the fuel, m is the mass of the fuel that has burned.
Qd = qd * md.
Qd = 1 * 10 ^ 7 J / kg * 440 kg = 440 * 10 ^ 7 J.
Qн = qн * mн.
Qн = 4.4 * 10 ^ 7 J / kg * 100 kg = 440 * 10 ^ 7 J.
Answer: the same amount of thermal energy will be released from firewood and oil Q = 440 * 10 ^ 7 J.
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