The enthalpy of hydrogenation is explained in following points:
The change in enthalpy (‘H’) that happens during catalytic hydrogenation.
It's the heat/enthalpy of reaction for a hydrogenation reaction.
It can be determine this from the standard enthalpies formation where R is reactants, P is products, n is the stoichiometric coefficient, H is enthalpy, and ∘ labels the enthalpy as the "standard" enthalpy ( T=C and P= atm ).
The above points clearly explain the enthalpy of hydrogenation.
