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ChemistryFor 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

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. **

You can write this mathematically as

P ∝ T or P = kT, where k is a proportionality constant

This video includes two example problems worked in full. If you need more practice for a test, we have a Gas Laws Practice Test available for purchase.

Video: Gay-Lussac’s Law

Handout: Video Notes Worksheet

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Our Chemistry Lessons playlist gives you practical help for the topics that chemistry students often struggle with. Each video has multiple example problems worked out in full. Topics covered include: Balancing Chemical Equations, the MOLE, Gas Laws, Molar Mass, and more.