Convert Enthalpy of Combustion (kj/kmol) to kj/kg

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To convert enthalpy of combustion from kJ/kmol to kJ/kg, multiply the kJ/kmol value by the inverse of the molar mass in kg. The conversion requires careful attention to units, as molecular weight converts moles to grams rather than kilograms. Some participants questioned the necessity of this conversion, suggesting it may not be commonly needed. Clarification was sought on whether the values were in kJ/kmol or kJ/mol. Accurate unit conversion is essential for obtaining the correct results in combustion studies.
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Hi

I'm studying combusion at the moment and was wondering how to convert the enthalpy of combustion values given in Steam Tables in kj/kmol to kj/kg? I have been trying to do mols multiplied by molecular weight, but this hasn't been giving me the answer I want.

Thanks for your help.
 
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I didnt really ask in the other thread.

Why do you want to do this anyway? I've never come across a situation where it would be useful.

I would think you would need to times the kj/kmol value by (1Kg/molar mass) as you want 1Kg eqivilant in moles.
 
Is it kJ/kmol or kJ/mol (no "k" prefix on mol)?

It does look like a straightforward moles→mass conversion problem. However, note that the molecular weight converts moles into grams, not kg. Perhaps the problem is there?
 

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