The efficiency of an ideal heat engine is 33%. What is the heater temperature if the refrigerator temperature is 400 K?
| May 22, 2021 | education
Efficiency of an ideal heat engine:
η = (Tn – Tx) / Tn,
where Tn is the heater temperature, Tx is the refrigerator temperature.
Substitute the values:
0.33 = (Tn – 400 K) / Tn;
0.33 Tn = Tn – 400 K;
0.67 Tn = 400 K;
Tn = 400 K / 0.67 = 597 K.
Answer: Heater temperature 597 K (323.5 ° C).
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