in my experiments, adsorbent has good removal capacity for copper but i hve obtained positive dG value? is it possible for a reaction to be non-spontaneous?
I think it is possible for some reactions to be non-spontaneous such as the reaction of nitrogen and oxygen to produce nitrogen monoxide
For further information you can follow the attached link
https://www.youtube.com/watch?v=7jZPvC-bl_c
Can you write the reaction and how did you calculate the delta G? May be you perform the experiment in conditions that are differed from the calculated ones.
using delta G= -RTlnK where i have used T = 17 C, 35 C, 55 C, converted them into kelvin, R= 8.314 J/mol-K and langmuir constant value is less than 1, which makes them positive. i have used langmuirs constant. please check this.
Available from: https://www.researchgate.net/post/how_to_calculate_Kc_in_deltaG-RT_lnKc_where_kcCa_Ce [accessed Jan 10, 2017].
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