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# IB Physics Topic 10: 10.1 Gas Laws

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Author: Felix Olsson
##### Description:
• State the equation of state for an ideal gas.
• Describe the difference between an ideal gas and a real gas.
• Describe the concept of absolute zero of temperature and the Kelvin scale of temperature.
• Solve problems using the equation of state of an ideal gas.

10.1 Thermodynamics (IB)

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Tutorial

## Absolute Zero

This video explains the concept of absolute zero in terms of an ideal gas. Using this concept we can define the Kelvin scale, used to measure temperature.

Source: Felix Olsson. The PhET simulation "Gas Properties" was used to make this video.

## The Difference Between Real and Ideal Gases

This video outlines the difference between a real and an ideal gas.

Source: Felix Olsson. The PhET simulation "Gas Properties" was used to make this video.

## Forces in a Real Gas (optional additional video)

This video addresses the issue from the previous video in more detail. It focuses on the problems that arise in using the ideal gas model for a real gas at low temperatures and high pressures.

Source: Felix Olsson. The PhET simulation "Changes of State" was used to make this video.

## The Equation of State

This video explains the terms in the equation of state for an ideal gas, and applies it to a few worked examples. (Excuse the handwriting!)

Source: Felix Olsson.