In SI units, P is measured in pascals, V is measured in cubic metres,

**n**is measured in moles, and T in kelvins (the Kelvin scale is a shifted Celsius scale, where 0.00 K = −273.15 °C, the lowest possible temperature). R has the value 8.314 J/(K. mol), or 0.08206 L. · atm/(mol.Similarly, what is the value of R in PV nRT?

In that equation, R is a universal constant, which is the product of the Boltzmann constant with the Avogadro constant. Its value is R = 8.314 Joule per kg and per mole = 0.08206

**L**.**atm**. mol−1.What is the ideal gas law?

An

**ideal gas**can be characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them may be deduced from kinetic theory and is called the.**n**= number of moles. R = universal**gas**constant = 8.3145 J/mol K.**N**= number of molecules.Which value of R to use?

It is crucial to match your units of Pressure, Volume, number of mole, and Temperature with the units of R. If you use the first value of R, which is

**0.082057**L atm mol^{-}^{1}K^{-}^{1}, your unit for pressure must be atm, for volume must be liter, for temperature must be Kelvin.