The enthalpy change of hydrogenation is less exothermic than suggested by the Kekulé model ( -208kJmol-1 instead of the expected -357kJmol-1), meaning Benzene is more thermodynamically stable than the Kekulé model predicts. The Kekulé model also suggests Benzene has 3 shorter C=C bonds and 3 longer C-C bonds. However, in reality, all bonds in Benzene are the same length. Furthermore, the Kekulé model suggests Benzene readily reacts with bromine water. However, the bromination of Benzene does not occur readily and requires a catalyst: the final evidence against the Kekulé model.