In this lesson, we will learn how to compare the work done by heat engines with different reservoir temperature ratios and how to calculate their efficiencies.
Q1:
What is the efficiency of a heat engine that has constant reservoir temperatures of 200∘C and 100∘C? Give your answer to three decimal places.
Q2:
The graph shows the relationship between the loss of the internal energy of the high-temperature reservoir of a heat engine 𝑄in and the gain in internal energy of the heat engine’s low-temperature reservoir 𝑄out for different values of 𝑇𝑇inout, the ratio of the temperatures of the reservoirs. Which is the greatest temperature ratio?
Q3:
A heat engine is represented in the diagram, showing the quantities associated with its operation. Which of the following formulas most correctly represents the relationship between 𝑄in, 𝑄out, and 𝑊?
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