Physics Laboratory Experiments
Physics Laboratory Experiments
8th Edition
ISBN: 9781285738567
Author: Jerry D. Wilson, Cecilia A. Hernández-Hall
Publisher: Cengage Learning
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Chapter 19, Problem 1ASA
To determine

The cause of the thermal expansion on the molecular level.

Expert Solution & Answer
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Answer to Problem 1ASA

As the substance temperatures increase, the internal energy increases, forcing the atoms or molecules to vibrate back and forth that causes the change in shape of the material.

Explanation of Solution

There is certain internal energy in every material. The atoms or molecules are connected as a single entity in the substance by a strong attractive force. The atoms are held more specifically as two masses associated with spring at either end.

Conclusion:

Thermal expansion is the behavior of matter in response to changes in its shape, area and volume.

As the substance temperatures increase, the internal energy increases, forcing the atoms or molecules to vibrate back and forth. The net vibration of the atoms should be so large that the material might lose its shape.

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