In physics, the gas constant is defined as the product of pressure and volume. Denoted by R and expressed as energy per temperature increase per mole. The value of R in atm is constant. But the value of gas constant can be expressed using various units. The R is also known as ideal gas constant or universal gas constant or molar constant.
Value Of Gas Constant
The value of R at atm that is at standard atmospheric pressure is R = 8.3144598 J.mol-1.K-1.
Value Of R
The value of R can be expressed in multiple units. The table given below comprised of the list of values of R in diverse units.
| Values of R | Units |
| 8.3144598 | J.K-1.mol-1 |
| 8.3144598 × 103 | amu.m2.s-2.K-1 |
| 8.3144598 × 10-2 | L.bar.K-1.mol-1 |
| 8.3144598 | m3.Pa.K-1.mol-1 |
| 62.363577 | L.Torr.K-1.mol-1 |
| 1.9872036 × 10-3 | kcal.K-1.mol-1 |
| 8.2057338 × 10-5 | m3.atm.K-1.mol-1 |
| 0.082057338 | L.atm.K-1.mol-1 |
Gas Constant Formula
The above value is calculated using the ideal gas equation as follows:
PV = nRT
⇒ R = P V /n T
Where,
- P is the Pressure of the ideal gas.
- V is the Volume of the ideal gas.
- T is the temperature.
- n is the number of moles of a given substance
Hope you have learnt the value of R at atm, along with the list of the value of R in various other units.
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