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.

 

[jarwish]

The value of R (the ideal gas constant) in terms of atmospheres is 0.0821 L·atm/(mol·K). It relates pressure, volume, temperature, and moles of gas in the ideal gas law PV=nRTPV = nRTPV=nRT. This constant is commonly used when pressure is measured in atmospheres.

 

[SkyDrifter]

The value of the gas constant RRR when using atmospheres (atm) for pressure is 0.0821 L·atm/(mol·K). This means that in the ideal gas law PV=nRTPV = nRTPV=nRT, if pressure is in atm, volume in liters, and temperature in Kelvin, you can use R=0.0821R = 0.0821R=0.0821 directly.