The internal combustion engine did a useful job equal to 32.66 * 10 ^ 7 J, and used up 40 liters of gasoline.
| December 13, 2020 | education
The internal combustion engine did a useful job equal to 32.66 * 10 ^ 7 J, and used up 40 liters of gasoline. Calculate the efficiency of this motor. The heat of combustion of gasoline is 4.6 * 10 ^ 7 J / kg, the density of gasoline is 710 kg / m ^ 3.
Efficiency = Ap / Az
40 l = 0.04 m3
Az = Qcombustion = qm = 4.6 * 10 ^ 7 * 0.04 * 710 = 13064 * 10 ^ 5
Then efficiency = 0.25 = 25%
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