Question

What would cause the experimental values of free energy, enthalpy, and entropy to be higher and lower than the literature values? I am trying to explain it in my paper. However, I cannot find a reason why.

Answer 1

Well I think experimental values of these quantities are measured by some instruments like isothermal titration calorimeter etc , in which all the required value such as Cp vs T is measured according to temperature then according to the function fed with that instrument it measured the value of enthalpy , Gibb's free energy , entropy etc.

The fact is, this is all about the preciseness of that instrument. If that instrument is made with very much preciseness then we will get a very close value of our output.So the error lies in the making of the instrument which get the experimental value different from literature value that is mathematically calculated.There may be some difference in calculation part like calculation of how many decimal places.So designing the instrument carry a very much factor in this case.

I think it will help.