Standard Temperature and Pressure (STP)
Initial Pressure (P1): 1 atm; Initial Volume (V1): 1 L; Initial Temperature (T1): 273.15 K; Final Volume (V2): 2 L; Final Temperature (T2): 273.15 K
Final Pressure (P2): 0.5 atm
Combined Gas Law Calculator
Chemistry0.0(0)
This calculator applies the combined gas law to determine the final pressure, volume, or temperature of a gas, given its initial conditions and changes in two of the three properties (pressure, volume, and temperature). The combined gas law is expressed as: (P1 * V1) / T1 = (P2 * V2) / T2
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How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Initial Pressure (P1), Initial Volume (V1), Initial Temperature (T1), Final Volume (V2), and Final Temperature (T2) in the units shown.
Step 2
Read Final Pressure (P2) in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Volume Doubled, Temperature Constant
Initial Pressure (P1): 1 atm; Initial Volume (V1): 1 L; Initial Temperature (T1): 273.15 K; Final Volume (V2): 2 L; Final Temperature (T2): 273.15 K
Final Pressure (P2): 0.5 atm
Temperature Doubled, Volume Constant
Initial Pressure (P1): 1 atm; Initial Volume (V1): 1 L; Initial Temperature (T1): 273.15 K; Final Volume (V2): 1 L; Final Temperature (T2): 546.3 K
Final Pressure (P2): 2 atm
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