How do I convert from kJ/kg to kJ/mol?

[charlotteyip]

I have researched that isobutanol has a heat of combustion of 35981 kJ/kg; however I need this to be in kJ/mol. From calculations, the molar mass of isobutanol was found to be 74g/mol. How would I go about in converting this?

Relevant equations (?)
#mols=mass/molarmass

But how can I use this?

 

[marcus]

74g/mol
What is the heat of combustion of one gram?

35.981 kJ per gram
You get 35.981 kJ when you burn one gram, and a mole is 74 grams.
So wouldn't burning a mole just give you 74 times as much as burning one gram?

What is 35.981 multiplied by 74?

 

[charlotteyip]

74g/mol
What is the heat of combustion of one gram?

35.981 kJ per gram
You get 35.981 kJ when you burn one gram, and a mole is 74 grams.
So wouldn't burning a mole just give you 74 times as much as burning one gram?

What is 35.981 multiplied by 74?

Thanks! I get it now :)