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Q. 4

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
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Short Answer

FIGURE Q21.4 shows the pV diagram of a heat engine. During which stage or stages is (a) heat added to the gas,(b) heat removed from the gas, (c) work done on the gas, and (d) work done by the gas?

(a) Heat added to gas

(b) Heat removed from gas

(c) Work done on gas

(d) Work done by gas

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Step by Step Solution

Step :1 Introduction 

A heat engine is a device that turns heat into work by extracting heat from a reservoir (hot body) and using it to perform some task. A small amount of heat is ejected into the sink (cold body). There will be some waste in the form of heat with this system. There are various types of heat engines, with the Carnot engine having the highest efficiency.

Step :2 Explanation 

Stage 1: Fixed volume but temperature increases, hence heat is added.

Stage 2: Isothermal process

Stage 3: Heat is removed by doing work on the gas.

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