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An older type of thermostat used in furnace and heat pump control is shown in ● Fig. 5.21. The glass vial tilts back and forth so that electrical contacts are made via the mercury (an electrically conducting liquid metal), and the furnace or heat pump is turned off and on. Explain why the vial tilts back and forth. (Newer thermostats are electronic.) Figure 5.21 An Exposed View of a Thermostat See Short Answer Question 4.

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An Introduction to Physical Science

14th Edition
James Shipman + 3 others
Publisher: Cengage Learning
ISBN: 9781305079137

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Chapter
Section
BuyFindarrow_forward

An Introduction to Physical Science

14th Edition
James Shipman + 3 others
Publisher: Cengage Learning
ISBN: 9781305079137
Chapter 5, Problem 4SA
Textbook Problem
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An older type of thermostat used in furnace and heat pump control is shown in ● Fig. 5.21. The glass vial tilts back and forth so that electrical contacts are made via the mercury (an electrically conducting liquid metal), and the furnace or heat pump is turned off and on. Explain why the vial tilts back and forth. (Newer thermostats are electronic.)

Chapter 5, Problem 4SA, An older type of thermostat used in furnace and heat pump control is shown in  Fig. 5.21. The glass

Figure 5.21 An Exposed View of a Thermostat See Short Answer Question 4.

To determine
Explain the reason for the glass vial tilts back and forth.

Explanation of Solution

A thermostat maintains a system at a constant temperature.  It maintains the constant temperature of a given system. It consists of bimetallic strips. It bends as it expands and contracts with temperature. It has two contacts at each end of the vial.

The mercury flows to the one end. It completes a circuit then there will be heating effect when the vial tilts in one direction...

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An Introduction to Physical Science
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