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Supporting Evidence for Kinetic Theory

publish date: 2026/05/19 08:39:33.388999 UTC

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Why does the physical phenomenon of spontaneous diffusion provide crucial historical evidence in support of the kinetic theory of matter?

It demonstrates that the constituent particles of fluids must be in a state of continuous, unceasing motion.

It proves that individual atoms are routinely destroyed and recreated through simple mechanical contact.

It proves that liquids and gases are dense, solid structures completely lacking internal empty space.

It demonstrates that molecules always travel in perfectly straight lines over long distances without hitting obstacles.

Correct Answer

It demonstrates that the constituent particles of fluids must be in a state of continuous, unceasing motion.

Explanation

Because mixing occurs entirely on its own without any macro stirring, shaking, or external forces, it directly proves that fluid particles possess their own intrinsic kinetic energy and are constantly in motion at the microscopic level.

Reference

Basic Physics: A Self-Teaching Guide

Quizzes you can take where this question appears

Diffusion through liquids and gases