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-   -   reference state entropy unit (https://www.cfd-online.com/Forums/fluent/189072-reference-state-entropy-unit.html)

enginpower June 12, 2017 12:06

reference state entropy unit
 
Hello,
on Fluent, a friend of mine, setting properties of a gas found that unit for reference state entropy is J/kgmol*K.
That's not clear to me.
J/kgmol*K=J/(g*K) or J/(kmol*K) or J/(kg*K)? Or what?

I found an old post here about that

It says simply that kgmol=kmol and so J/kgmol*K=J/(kmol*K). Is it correct?

Thanks

LuckyTran June 12, 2017 19:21

1 kg mol is indeed 1 kmol (or 1 gmol is 1 mol).

Chemists like to think that the molecular weight must always be expressed in gm/mol which gives rise to the need to defined different moles when a different unit of mass is used.

enginpower June 13, 2017 07:22

Ok,
so, to be more clear, also to future learners, the correct interpretation in SI units is

J/kgmol*K= J/(kmol*K)

Thanks


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