The internal combustion engine performed useful work equal to 3.45 * 10 ^ 7 J

The internal combustion engine performed useful work equal to 3.45 * 10 ^ 7 J and at the same time consumed gasoline weighing 3 kg. Determine the efficiency of this motor.

These tasks: Ap (useful work performed by the internal combustion engine) = 3.45 * 10 ^ 7 J; m (mass of gasoline consumed by the engine) = 3 kg.

Reference values: q (specific heat of combustion of gasoline) = 4.6 * 10 ^ 7 J / kg.

The efficiency of the considered internal combustion engine is determined by the formula: η = Ap / Az = Ap / (q * m).

Calculation: η = 3.45 * 10 ^ 7 / (4.6 * 10 ^ 7 * 3) = 0.25 (25%).

Answer: The efficiency of the considered internal combustion engine is 25%.