How to calculate ΔGa for absorbed species

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ANJI BABU
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How to calculate ΔGa for absorbed species

#1 Post by ANJI BABU » Fri Mar 13, 2015 1:32 pm

Dear All,

I am trying to calculate the Free Energies of absorbed species by using formula ΔGa=Ea+ΔZPE − TΔS, In this formula how to calculate change in difference in entropy???? which calculations i have to do to get ΔZPE and TΔS.
please help me in this case.

Thank you very much.

anji

alex
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Re: How to calculate ΔGa for absorbed species

#2 Post by alex » Fri Mar 27, 2015 2:06 pm

Hi Anji,

you'll have to do a frequency analysis. Then you can calculate the zero point vibrational energy as well as the partition sums (hence H and S) for your system from the frequencies.

Cheers,

alex

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