The standard free energy of a reaction At 25 oC, ∆G°= 553 J/mol for the reaction A ⟶ B+C. Determine the concentration of the substance “B” at equilibrium if only a quarter of reactant remains at equilibrium.

Question

Group of answer choices

0.087 mol

0.349 mol

All suggested answers in this question are not close to the correct value

0.785 mol

0.262 mol

Answer 1

dGo = -RTlnK
-553 = 8.314*298*ln K
ln K = -0.223
K = 0.598
The problem says 1/4 is left. How much did we start with? Is that 1/4 in moles or is it Mols/L.