Map Organic Chemistry Roberts & Company Publishers presented by Sapling Leaming

Question

Map Organic Chemistry Roberts & Company Publishers presented by Sapling Leaming Marc Loudon A reaction (aq)+ B(aq) (aq) A s a standard free-energy change of -4.68 kJ/mol at 25 oC. What are the concentrations of A, B, and C at equilibrium if, at the beginning of the reaction, their concentrations are 0.30 M, 0.40 M, and 0 M, respectively? Number Number Number Al- .19 29 M M M How would your answers above change if the reaction had a standard free-energy change of +4.68 kJ/mol? O All concentrations would be lower. O All concentrations would be higher O There would be no change to the answers. O There would be less A and B but more C O There would be more A and B but less C Previous 3 Give Up & View Solution Check Answer Next Exit 8 Hint

Explanation / Answer

dG = -RT lnK

4.68 kJ = - ((.008314) (298Kelvin) lnK

lnK = - 1.888

K = 0.61525
under this situation, the products are not favored...
but since the term equilibrium indicates that it will proceed..
the concentrations of A & B will decrease
while the concentration of C will increase

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