# Combined Gas Law (V)

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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.

## INPUTS

You can compute the volume by selecting units and entering the following:

• k - proportionality constant for the gas
• P - pressure of the gas
• T - temperature of the gas

## Other Combined Gas Formulas

The combined gas law is mathematically expressed as:  (P*V) / T = k.  The following solve for each component:

• Combine Gas Law (P) - this solves for the pressure of the gas if you know volume, temperature and the combined gas constant for the specific gas.
• Combine Gas Law (V) - this solves for the volume of the gas if you know pressure, temperature and the combined gas constant for the specific gas.
• Combine Gas Law (T) - this solves for the temperature of the gas if you know pressure, volume and the combined gas constant for the specific gas.
• Combine Gas Law (k) - this solves for the gas constant of proportionality of the gas if you know pressure, volume and the temperature for the specific gas.

## NOTES

The combined gas law is a gas law which is based on the combination of Charles's law, Boyle's law, and Gay-Lussac's law. The combined gas law states the ratio between the pressure-volume product and the temperature of a system remains constant.

This constant ratio can be used when comparing different conditions using the same substances because the value of k is characteristic of the gaseous substance..

These three gas laws each relate one thermodynamic variable to another mathematically while holding everything else constant. Charles's Law holds pressure constant. Boyle's Law holds temperature constant. Gay-Lussac's Law holds volume constant. The inter-dependence of these variables of pressure, temperature and volume is shown in the combined gas law.