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The Cause of Gas Pressure

publish date: 2026/05/19 08:28:36.580608 UTC

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From a microscopic perspective, what directly produces the macroscopically measurable pressure exerted by an enclosed gas against the walls of its container?

The collective impact forces of billions of gas molecules striking the container walls.

The gravitational pulling force between individual gas molecules.

The chemical breakdown of gas molecules when they touch the container's surface material.

The static electric attraction between the gas particles and the outside atmosphere.

Correct Answer

The collective impact forces of billions of gas molecules striking the container walls.

Explanation

Gas pressure is a mechanical result of kinetic energy. It is caused by the continuous, rapid bombardment of the container's interior surfaces by trillions of tiny gas molecules exerting small impact forces.

Reference

Basic Physics: A Self-Teaching Guide

Quizzes you can take where this question appears

Molecules in gases