calorie per mole kelvin
Molar entropyexact by definition
The calorie per mole per kelvin, historically called the entropy unit, is exactly 4.184 J/(mol·K) using the thermochemical calorie. The factor is exact by definition of that calorie. Older American thermochemical tables list standard entropies in these units, where the gas constant R is 1.987 cal/(mol·K), often rounded to 2.
Watch out: The abbreviation e.u. for entropy unit appears in mid-twentieth-century literature and means exactly this unit. It is not the same as anything in modern SI naming, and it should be converted rather than carried forward.
| 1 | 4.184 |
One calorie per mole kelvin in every molar entropy unit
| 4.184 | joule per mole kelvin (J/(mol·K)) | |
| 4.184 | joule per mole Celsius (J/(mol·°C)) | |
| 4.184 | kilojoule per kilomole kelvin (kJ/(kmol·K)) | |
| 1 | calorie per mole kelvin (cal/(mol·K))this unit | |
| 1 | entropy unit (e.u.) | |
| 0.999331 | BTU per pound-mole Rankine (BTU/(lb-mol·°R)) | |
| 0.50322 | Boltzmann constant per particle (kB/particle) | |
| 0.004184 | kilojoule per mole kelvin (kJ/(mol·K)) |
Solvers that use molar entropy