[Enthalpy]

Hello everybody!

Enthalpies of formation are often inconsistent and inaccurate, even when they specify the temperature and aggregation state. Even compounds as common as hexamethylene tetramine have no consistent data. I suspect it's because the procedure burns the substance, which produces much heat that overshadows small variations in the enthalpy of formation.

Total hydrogenolysis wouldn't have that drawback. For the liquid alkanes and homologue amines that interest me, going to methane and ammonia.

But how difficult would it be to use? Does it need to preheat the hydrogen a lot, thus defeating the purpose of fine heat measure? Could some substances not react at all? Other drawbacks?

Thank you!