substance. The unit symbol is written kcal/mol or kcal⋅mol−1. As typically measured, one kcal/mol represents a temperature increase of one degree Celsius in
vice versa. The overall barrier of 10.8 kcal/mol corresponds to a rate constant of about 105 s–1 at roomtemperature. Note that the twist-boat (D2) conformer
increasing temperature, and at roomtemperature most of the emission is in the infrared region of the electromagnetic spectrum. As the temperature increases
approximately 23 kcal/mol. This is also the roughly the magnitude of Ea for a reaction that proceeds over several hours at roomtemperature. Due to the relatively