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The Combined Gas Law Volume calculator computes the volume of a gas using the combined gas law that relates the product of pressure and volume to temperature of a gas.
INSTRUCTIONS: Choose units and enter the following:
Gas Volume (V): The calculator returns the volume in liters. However this can be automatically converted to compatible units via the pull-down menu.
The Math / Science
The Combined Gas Law associates the pressure, volume, temperature and a constant of a gas, based on a combination of Charles's law, Boyle's law, and Gay-Lussac's law. There is no 'official' founder for this law because it is a consolidation of the three other laws. The combined gas law states the ratio between the pressure-volume product and the temperature of a system remains constant (k). This constancy can be used when comparing different conditions using the same substances. The combined gas law is mathematically expressed as follows:
PiViTi=PfVfTf=k
The Combined Gas Law calculator groups the forms of the Combined Gas Law formula in two ways as follows:
P • V / T = k
- Pressure based on known volume, temperature and the combined gas constant.
- Volume based on know pressure, temperature and the combined gas constant.
- Temperature based on known pressure, volume and the combined gas constant.
- k gas constant based on the proportionality of the gas if you know pressure, volume and the temperature for the specific gas.
Pi • Vi/Ti = Pf • Vf/Tf
Since P•V/T = k, one can compute the initial (i) and final (f) states using the expanded version of the Combined Gas Law. The Pi • Vi/Ti = Pf • Vf/Tf tab allows the user to enter any five of the six values in the formula to compute the remaining one via the Combined Gas Law.
- Final Pressure based on an initial and final temperature and volume and an initial pressure.
- Final Temperature based on an initial and final pressure and volume and an initial temperature.
- Final Volume based on an initial and final pressure and temperature and an initial volume.
