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Lesson: Gay-Lussac’s Law Physics

In this lesson, we will learn how to use the formula P/T = constant (Gay-Lussac’s law) to calculate the pressure or temperature of a gas that is heated or cooled at a constant volume.

Lesson Plan

Students will be able to

know that, for an ideal gas at constant volume, the pressure, , of the gas is proportional to the temperature, ,
use , where is a constant, to determine the pressure or temperature of a gas before or after a thermodynamic process that keeps the volume constant.

Lesson Presentation

Lesson Video

Lesson Explainer

Lesson Playlist

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02:23
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11:30

Lesson Worksheet

Q1:

For a gas at a constant volume, if the temperature is , then the pressure .

Q2:

Which of the following is the correct unit for pressure?

Q3:

A gas has an initial pressure of 500 Pa, a volume of 0.1 m³, and a temperature of 300 K. It is allowed to expand without changing temperature until its volume is 1 m³. Then, the temperature of the gas is increased, while the volume is kept constant, to 360 K. What is the final pressure of the gas?