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### delta g

Posted: Tue Mar 10, 2020 5:02 pm
how do we know when we should use products-reactants vs delta g= delta h - t delta s

### Re: delta g

Posted: Tue Mar 10, 2020 5:08 pm
would it be the same as long as it is standard conditions? at standard temperature?

### Re: delta g

Posted: Tue Mar 10, 2020 6:19 pm
I think based on the information you are given. If it isn't as standard temp, use g= delta h - t delta s.

### Re: delta g

Posted: Tue Mar 10, 2020 6:26 pm
If we are given a chemical reaction formula and have the DeltaG values similar to that of the midterm, then we would use products minus reactants. However, if given entropy or enthalpy, I believe we would be prompted to use the DeltaG = DeltaH - TDeltaS.

### Re: delta g

Posted: Tue Mar 10, 2020 6:43 pm
It depends on what information you're given!

### Re: delta g

Posted: Tue Mar 10, 2020 6:44 pm
similar to the midterm problem when given the values for delta g you can you use the products minus reactants equation but when given values for enthalpy and entropy you should be prompted to use the second equation to solve for delta g.

### Re: delta g

Posted: Tue Mar 10, 2020 9:35 pm
depends on what is given. if you know dG for both then the easiest way is to simply use those values. If they aren't given you are probably going to have to use enthalpy, temp, and entropy to find the dG values then subtract reactants from products