# Gibbs energy changeWatch

#1
So I'm given standardised entropy values and enthalpies of formation. I'm asked to calculate the Gibbs energy change at 298K for the combustion of one mole of C7H8.
So i guess i use G=H-TS to get the standard Gibbs energy but how do i get molar Gibbs energy?
0
7 years ago
#2
(Original post by 'bob')
So I'm given standardised entropy values and enthalpies of formation. I'm asked to calculate the Gibbs energy change at 298K for the combustion of one mole of C7H8.
So i guess i use G=H-TS to get the standard Gibbs energy but how do i get molar Gibbs energy?
gibbs energy change is in J

molar gibbs energy change is in J per mol

so divide your answer by no of mol or multiply by avogadro constant to get the per mol part.
0
#3
(Original post by shengoc)
gibbs energy change is in J

molar gibbs energy change is in J per mol

so divide your answer by no of mol or multiply by avogadro constant to get the per mol part.
I can always rely on you shegnoc lol
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