Question

Describe three ways to show that gases exist

   Describe three ways to show that gases exist

Living by Chemistry

Living by Chemistry

Angelica M. Stacy 2nd Edition

Chapter 11, Problem 4

Instant Answer

Solved by Expert Ronald Prasad

05/11/2020

Step 1

The sensation you feel on your hand is the air striking it. The harder you blow, the harder it pushes against your hand. This is a simple demonstration that air, which is a gas, exists. Show more…

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Describe three ways to show that gases exist

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Key Concepts

Compressibility of Gases

Gases are highly compressible compared to liquids and solids, as their particles are spread far apart. Demonstrating that a gas can be compressed into a smaller volume under high pressure provides evidence for its existence and directly relates to the kinetic theory of gases.

Diffusion and Effusion

The free movement of gas particles allows them to spread out and mix with other gases spontaneously, a process known as diffusion. Effusion, the rapid escape of gas through a small hole, similarly demonstrates the particulate and dynamic nature of gases, reinforcing their existence despite being invisible.

Pressure and Volume Relationships

The behavior of gases under varying conditions of pressure and volume, as described by gas laws like Boyle’s Law, provides observable evidence of their presence. Measuring the pressure exerted by a gas in a confined space and how it changes with volume validates the concept that gases consist of particles in constant motion.

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