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Aruwin
Aruwin • Jan 25, 2012

need help on Gibbs Free Energy

Hi everyone. This time I need help with finding the Gibbs Free Energy of this chemical reaction: CaC2(s)+2H2O(l) --> C2H2 + Ca(OH)2

The question says to use the standard-state free energies of formation, [​IMG]Gfo for finding the Gibbs free energy to prove that even if Acetylene cant be synthesized from an element,we can get Acetylene from this reaction.

StaNdard free energies of formation for each compound:
CaC2=-64.9
H2O=-237.2
C2H2=209.2
Ca(OH)2=-898.6

The answer is -150.1 kJ
Aruwin
Aruwin • Jan 25, 2012
Oh,i have figured it out 😀
Why don't you post your research???
Aruwin
Aruwin • Jan 26, 2012
Praveen-Kumar
Why don't you post your research???
Oh, because I didn't find the answer through internet but from my textbook. It was actually easy. Just minus the total energy of the reactants from the total energy of the products. I was confused at first.

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