IB Chemistry S1.5.1 the Ideal Gas Model Notes

Assumptions of the Ideal Gas Model

The ideal gas model is based on five key assumptions.

These assumptions simplify the complex behavior of real gases, allowing us to predict their behavior using mathematical relationships.

1. Gas Particles Are in Constant, Random Motion

Gas particles are never at rest; they move in straight lines until they collide with another particle or the walls of their container.

This constant, random motion explains why gases fill any container they occupy, regardless of its shape.

Analogy

When you spray perfume in a room, the gas molecules disperse evenly, filling the available space.

Tip

Visualize gas particles as tiny billiard balls moving in random directions and bouncing off walls without losing energy.

2. Collisions Between Gas Particles Are Perfectly Elastic

When gas particles collide with each other or with the walls of their container, no energy is lost as heat or sound.

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Note

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Tip

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Tip

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IB Chemistry S1.5.1 the Ideal Gas Model Notes

Assumptions of the Ideal Gas Model

1. Gas Particles Are in Constant, Random Motion

2. Collisions Between Gas Particles Are Perfectly Elastic

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Assumptions of the Ideal Gas Model

1. Gas Particles Are in Constant, Random Motion

2. Collisions Between Gas Particles Are Perfectly Elastic

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

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Excepteur sint occaecat cupidatat non proident

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Structure 1. Models of the particulate nature of matter5 subtopics

Structure 2. Models of bonding and structure4 subtopics

Structure 3. Classification of matter2 subtopics

Reactivity 1. What drives chemical reactions?4 subtopics

Reactivity 2. How much, how fast and how far?3 subtopics

Reactivity 3. What are the mechanisms of chemical change?4 subtopics

IB Chemistry S1.5.1 the Ideal Gas Model Notes

Structure 1. Models of the particulate nature of matter5 subtopics

Structure 2. Models of bonding and structure4 subtopics

Structure 3. Classification of matter2 subtopics

Reactivity 1. What drives chemical reactions?4 subtopics

Reactivity 2. How much, how fast and how far?3 subtopics

Reactivity 3. What are the mechanisms of chemical change?4 subtopics

Assumptions of the Ideal Gas Model

1. Gas Particles Are in Constant, Random Motion

2. Collisions Between Gas Particles Are Perfectly Elastic

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Assumptions of the Ideal Gas Model

1. Gas Particles Are in Constant, Random Motion

2. Collisions Between Gas Particles Are Perfectly Elastic

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account