What is the value of R in atm?

[MarisolLin]

I’m studying gas laws and want to know the value of the gas constant (R) when using atmospheres (atm) as pressure units. Can someone provide the exact value?

 

[jgvhka]

The value of R depends on the units used in the ideal gas law:

PV = nRT

When pressure (P) is in atmospheres (atm), R is:

R =0.0821L\cdotpatm/(mol\cdotpK)

• L = liters (volume)
• mol = moles of gas
• K = kelvin (temperature)

In short: R = 0.0821 L·atm/(mol·K) when using atm.