Question

В процессе работы тепловой машины за некоторое время рабочим телом было получено от нагревателя количество теплоты 1,6 МДж, передано холодильнику 1,2 МДж. Определи КПД тепловой машины. Ответ (округли до целого числа)

Answer 1

Ответ:

25%

Объяснение:

Q1=1.6 МДж    Q2=1.2 МДж   η=?

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η=(Q1-Q2)/Q1=*1.6-1.2)/1.6=0.25

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Answer 2

Calculating the Efficiency of a Heat Engine

To calculate the efficiency of a heat engine, we can use the formula:

Efficiency (η) = (Useful energy output / Energy input) × 100%

In this case, the useful energy output is the amount of heat transferred to the cold reservoir, and the energy input is the amount of heat received from the hot reservoir.

Given: - Heat received from the hot reservoir (Qin) = 1.6 MJ - Heat transferred to the cold reservoir (Qout) = 1.2 MJ

We can now calculate the efficiency using the formula.

Efficiency (η) = (1.2 / 1.6) × 100%

Calculation

Efficiency (η) = (1.2 / 1.6) × 100% = 75%

Therefore, the efficiency of the heat engine is approximately 75%.