Why is metal a better conductor of heat than non-metals? In metals, apart from transferring heat energy by the relatively slow process of molecular collision, another faster process of free electron diffusion takes place. Metals contain free electrons that are mobile. When heated, these free electrons gains KE and will diffuse to the cooler end at high speeds. In the process, they will collide with atoms at the cooler end and transfer kinetic energy to them.

Why is metal a better conductor of heat than non-metals? In metals, apart from transferring heat energy by the relatively slow process of molecular collision, another faster process of free electron diffusion takes place. Metals contain free electrons that are mobile. When heated, these free electrons gains KE and will diffuse to the cooler end at high speeds. In the process, they will collide with atoms at the cooler end and transfer kinetic energy to them.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter16: Temperature And The Kinetic Theory Of Gases

Section: Chapter Questions

Problem 15P: The active element of a certain laser is made of a glass rod 30.0 cm long and 1.50 cm in diameter....

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The active element of a certain laser is made of a glass rod 30.0 cm long and 1.50 cm in diameter. Assume the average coefficient of linear expansion of the glass is equal to 9.00 106 (C)1. If the temperature of the rod increases by 65.0C, what is the increase in (a) its length, (b) its diameter, and (c) its volume?
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