Chapter 21: Q. 5 (page 593)

Rank in order, from largest to smallest, the thermal efficiencies $η_{1}$ to $η_{4}$ of the four heat engines in FIGURE Q21.5. Explain.

Short Answer

Expert verified

Rank in order from largest to smallest $η_{3} > η_{2} = η_{1} >$ $η_{4}$

Step by step solution

Step :1 Introduction

The Carnot engine is the most efficient of any heat engine that operates between two temperatures.

Heat pumps take heat from a cold place and transport it to a warmer one in the opposite direction of spontaneous heat transfer; nevertheless, a refrigerator is a piece of household equipment that is kept at a lower temperature than the outside air.

Step :2 Explanation

Use $η = W_{out} / Q_{in}$ to get ,

\begin{aligned} η_{1} = 0.4 \\ η_{2} = 0.4 \end{aligned}

$\begin{aligned} η_{3} = 0.6 \\ η_{4} = 0.06 \end{aligned}$

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Rank in order, from largest to smallest, the thermal efficiencies $η_{1}$ to $η_{4}$ of the four heat engines in FIGURE Q21.5. Explain.

Short Answer

Step by step solution

Step :1 Introduction

Step :2 Explanation

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Rank in order, from largest to smallest, the thermal efficiencies η1to η4of the four heat engines in FIGURE Q21.5. Explain.

Short Answer

Step by step solution

Step :1 Introduction

Step :2 Explanation

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Physics Textbooks

Geometrical and Physical Optics

Measurements

Fundamentals of Physics

Kinematics Physics

Electrostatics

Circular Motion and Gravitation

Study anywhere. Anytime. Across all devices.

Rank in order, from largest to smallest, the thermal efficiencies $η_{1}$ to $η_{4}$ of the four heat engines in FIGURE Q21.5. Explain.