## 20.2.12

### Happy Birthday Henry Eyring

A Mexican-American theoretical chemist, born 1901, whose primary contribution was in the study of chemical reaction rates and intermediates. A prolific writer, he authored more than 600 scientific articles, 10 scientific books, and a few books on the subject of science and religion. The Eyring equation in chemical kinetics relates the reaction rate to temperature.

$\ln \frac{k}{T} = \frac{-\Delta H^\ddagger}{R} \cdot \frac{1}{T} + \ln \frac{k_\mathrm{B}}{h} + \frac{\Delta S^\ddagger}{R}$

This equation follows from his transition state theory and is theoretically derived. Previous understanding of reaction rates and temperature came from Arrhenius’s empirically derived equation.

#### 1 comment:

Rebecca Holt Stay said...

should have gotten the Nobel.