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Gay-Lussac’s Law

Pressure is directly proportional to Temperature (at constant volume).

📌 Quick Idea

Proponent: Joseph Louis Gay-Lussac
Rule: When temperature goes up, pressure increases. When temperature goes down, pressure decreases.

🍲 Pressure Cooker + Temperature

Volume: constant ✅ Heat controls pressure 🔥
Pressure
1.25 atm
Higher temp = higher pressure
Temperature
25 K
Increase temp → pressure up
Pressure
1.25 atm
Direct relationship
0°C100°C

✅ Goal: Watch pressure increase as temperature rises.

📈 Pressure vs Temperature

Straight line up because when Temperature increases, Pressure increases.

● Dot = current reading  |  Line = Gay-Lussac line (P ∝ T)