The ideal gas law is the equation of state of a hypothetical ideal gas. This equation was first stated by French engineer and physist Emile Clapeyron (1799-1864) in 1834 as a combination of three empirical gas laws proposed by Robert Boyle, Joseph Louis Gay-Lussac, and Amedeo Avogadro.

where *p* is the pressure, *V* is the volume, *n* is the amount of substance of gas, *R* is the universal gas constant, and *T* is the thermodynamic temperature.

The universal gas constant *R* is defined as the product of Avogadro constant *N*_{A} (number of particles in one mole of gas) and Boltzmann's constant *k* (it relates the kinetic energy of particles in a gas).

(*n* = const.)

(*p* = const., *n* = const.)

(*V* = const., *n* = const.)

(*T* = const., *n* = const.)

Avogadro's law states that, equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.

Dalton's law of partial pressures states that the pressure of a mixture of gases simply is the sum of the partial pressures of the individual components.

Citing this page:

Generalic, Eni. "Gas laws calculator." *EniG. Periodic Table of the Elements*. KTF-Split, 30 Aug. 2017. Web. {Date of access}. <https://www.periodni.com/gas_laws_calculator.html>.

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