Lesson: Heat Engines

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.

Worksheet: 2 Questions

Q1:

What is the efficiency of a heat engine that has constant reservoir temperatures of and ? Answer to three significant figures.

Q2:

The graph shows the relationship between the loss of the internal energy of the high-temperature reservoir of a heat engine and the gain in internal energy of the heat engine’s low-temperature reservoir for different values of , the ratio of the temperatures of the reservoirs. Which is the greatest temperature ratio?

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