Charles’s Law Calculator
Relates the volume and temperature of a gas at constant pressure. Choose what to find; the field for that value is ignored.
Answer
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Both states
Reading this —
The formula
V₁ ÷ T₁ = V₂ ÷ T₂
T is in kelvin. At constant pressure, volume is proportional to absolute temperature.
What to watch out for
Enter temperatures in any scale: they are converted to kelvin before dividing.
Frequently Asked Questions
What volume does 2 L at 25 °C reach at 50 °C?
2.168 L, not 4 L, because doubling the Celsius figure does not double the absolute temperature.
What temperature doubles the volume from 25 °C?
596.30 K = 323.15 °C.