Chemistry: Gay-Lussac's Law (Gas Laws) with 2 examples | Homework Tutor

Chemistry: Gay-Lussac's Law (Gas Laws) with 2 examples
For a gas, temperature and pressure are directly proportional. When you keep everything else constant, as the temperature of a gas goes up, its pressure goes up. As the temperature of a gas goes down, its pressure goes down.

Gay-Lussac’s Law says that when the volume and amount of gas is constant, pressure and temperature are directly proportional. P ∝ T You can write this mathematically as P = kT

We include two example problems worked in full.
If you need more practice for a test, we have a Gas Laws Practice Test available for purchase on our website at (navigate to “digital downloads,” or go straight to This Practice Test has 50 problems (includes true-false, multiple choice, short answer, fill-in-the-blank, & problems worked in full). The test comes with a complete answer key, with explanations.

You can jump to these sections in the video:
0:00 Definition of Gay-Lussac's Law
1:45 Using Gay-Lussac's Law to compare two situations (before and after)
2:06 Example 1
3:18 Example 2
4:32 Other Gas Laws

Related videos about gases:
Boyle's Law

Charles's Law

Ideal Gas Law


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Brown and LeMay Chemistry: The Central Science
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Uncle Tungsten: Memories of a Chemical Boyhood by Oliver Sacks

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Kimberly Hatch Harrison received degrees in Biology and English Literature from Caltech before working in pharmaceuticals research, developing drugs for autoimmune disorders. She then continued her studies in Molecular Biology (focusing on Immunology and Neurobiology) at Princeton University, where she began teaching as a graduate student. Her success in teaching convinced her to leave the glamorous world of biology research and turn to teaching full-time. Kimberly taught AP Biology and Chemistry at an exclusive prep school for eight years. She is now the head writer and producer of Socratica Studios.


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