Hello, I have a problem regarding writing thermodynamical equations with the heat of reaction next to it. Normally you see the equation with the heat of reaction in kJ next to it. But sometimes I see kj/mole. for example if we have 2A+3B---2C+3D how can I identify what kj/mole is. Per mole of what exactly? the "per mole" confuses me incredibly. For the Heat of formation it means "per mole" OF the resulting substance. But thats only for the heat of formation. Can anyone help me out please?

Thanks in advance!

Question

Hello, I have a problem regarding writing thermodynamical equations with the heat of reaction next to it. Normally you see the equation with the heat of reaction in kJ next to it. But sometimes I see kj/mole. for example if we have 2A+3B--->2C+3D  how can I identify what kj/mole is. Per mole of what exactly? the "per mole" confuses me incredibly. For the Heat of formation it means "per mole" OF the resulting substance. But thats only for the heat of formation. Can anyone help me out please?

Thanks in advance!

abb0t · Answer

It's like division. per unit gallon, 25$\sf \frac{min}{gal}$...

anonymous · Answer

wow i hv just the same confution...cant help ....