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[JEBradley]

I'm not a student but I believe my question is probably quite basic and people will laugh at my ignorance

Looking for data on the enthalpy of solution for certain compounds I went to Perry's - Wonderful! The data is there but the units are in kg cal/g mol. Can someone explain what this means?? I was expecting something along the lines of cal/g mol but alas there was this extra kg stuck on the beginning.

Checked in another version of Perrys and the units are G. cal/g mol - as a European i'm horrified as this means Giga Calories!!! my god who's have thought such temperatures could be reached by throwing salt in water

But seriously - any help would be appreciated.

[joerd]

I agree, some pretty bad labeling here. Read the note below the table and it becomes clear what the units mean because they tell you how they convert to Btu/lbmol.

What Perry calls kg-cal / g-mole equals kcal/mole as we know it, i.e. 1000 calories per mole, or 4186.8 J/mol.
What Perry calls G-cal/g-mole is actually gram-calories per mole, or cal/mole, i.e. 4.1868 J/mol.

Pretty confusing but it looks like you haven't lost your wits.