🥼organic chemistry review

Heat of hydrogenation

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

The heat of hydrogenation is the amount of energy released when a double bond in an alkene reacts with hydrogen gas to form a single bond, turning it into an alkane. This process is exothermic, indicating that energy is given off during the conversion.