kilojoule per mole kelvin
Molar entropyexact by definition
The kilojoule per mole per kelvin is a thousand joules per mole per kelvin, an exact decimal prefix. It is uncommon for entropies, which are naturally sized in J/(mol·K), but it appears where entropy terms are combined with enthalpies already expressed in kJ/mol, since TΔS must be in the same units as ΔH before they can be subtracted.
Watch out: The classic Gibbs free energy error is exactly this mismatch: ΔH in kJ/mol and ΔS in J/(mol·K), subtracted without converting. The factor of 1000 changes a spontaneous reaction into a non-spontaneous one.
| 1 | 1,000 |
One kilojoule per mole kelvin in every molar entropy unit
| 1,000 | joule per mole kelvin (J/(mol·K)) | |
| 1,000 | joule per mole Celsius (J/(mol·°C)) | |
| 1,000 | kilojoule per kilomole kelvin (kJ/(kmol·K)) | |
| 239.006 | calorie per mole kelvin (cal/(mol·K)) | |
| 239.006 | entropy unit (e.u.) | |
| 238.846 | BTU per pound-mole Rankine (BTU/(lb-mol·°R)) | |
| 120.272 | Boltzmann constant per particle (kB/particle) | |
| 1 | kilojoule per mole kelvin (kJ/(mol·K))this unit |
Solvers that use molar entropy