Gay-Lussac’s Law Calculator
Relates the pressure and temperature of a gas in a rigid container. Choose what to find; the field for that value is ignored.
Answer
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Both states
Reading this —
The formula
P₁ ÷ T₁ = P₂ ÷ T₂
T is in kelvin. In a rigid container, pressure is proportional to absolute temperature.
What to watch out for
Use absolute pressure, not gauge pressure.
Frequently Asked Questions
What is the pressure of a gas at 1 atm and 25 °C when warmed to 50 °C?
1.084 atm = 109.8 kPa.
Why does this law only work in kelvin?
At 0 °C a gas still has pressure. Pressure is only proportional to temperature when zero means absolute zero.