One equation ties free energy to the equilibrium constant: ΔG° = −RT ln K. Slide the values and watch K climb or collapse. At the crossover temperature K passes through 1.
At 298.15 K each 5.71 kJ of ΔG° is worth one step on this ruler. That number is just RT ln 10.
| ΔG° at this T | |
| ΔG° in joules | |
| RT | |
| ln K | |
| log K | |
| crossover T, where K = 1 |