Question

Определите количество теплоты полученное тепловым двигателем от нагревателя если его кпд составляет 40 а холодильнику было передано 5 кдж теплоты

Answer 1

Если КПД двигателя = 40 процентов, а вся полученная полезная энергия уходит в холодильник, а холодильник получил 5 кДж энергии, значит:
Q полученное двигателем = 5000 Дж / 40 * 100 = 5000 Дж * 2.5 = 12500 Дж.
Ответ: 12500 Дж

Answer 2

Calculating Heat Received by the Heat Engine

To determine the amount of heat received by the heat engine from the heater, we can use the formula for the efficiency of a heat engine:

Efficiency (η) = Output/Input

Where: - Efficiency (η) = 40% or 0.40 (given) - Input = Heat received by the heat engine from the heater - Output = Heat transferred to the refrigerator

We are given that the heat transferred to the refrigerator is 5 kJ.

Using the efficiency formula, we can rearrange it to solve for the input (heat received by the heat engine):

Input = Output / Efficiency

Substituting the given values: Input = 5 kJ / 0.40

Calculating the input: Input = 12.5 kJ

Therefore, the heat received by the heat engine from the heater is 12.5 kJ.