Combined Gas Law Calculator
Handles a gas whose pressure, volume and temperature all change. Choose what to find; the field for that value is ignored.
Answer
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Both states
PV ÷ T — J/K
Reading this —
The formula
P₁ × V₁ ÷ T₁ = P₂ × V₂ ÷ T₂
T is in kelvin. Boyle’s, Charles’s and Gay-Lussac’s laws are all special cases of this.
What to watch out for
If the amount of gas changes too, use the ideal gas law for each state instead.
Frequently Asked Questions
What is the final volume of 2 L at 1 atm and 25 °C, taken to 2 atm and 50 °C?
1.084 L.
What happens if a temperature is below absolute zero?
There is no such temperature. Absolute zero, −273.15 °C, is the lowest possible, so check the figure and its unit.