Using Free Energies
The free energy,ΔG, of a reaction can be determined from thefree energies of the reagents and products:
ΔGrxn=ΣΔG(prods)-ΣΔG(reags)
This pages presents "generic" problems to provide practice in applying the above relationship. The problems are generic in that basic symbols are used to represent the chemical species rather that using actual chemical formulae. Further, to emphasize the methodology rather than the numbers, all heats of formation will have one sig figure and be between 10 and 100.
- When you press new problem, a "balanced chemical equation" and a table of heats of formation will be presented to the right of the table.
- Calculate the heat of the reaction, enter it in the answer cell and press "Check Answer."
- Pressing the "Show Answer" button will display a complete solution and you will no longer be able to submit an answer to that question.