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The accompanying diagram shows how the free energy, G,
Chapter , Problem 19.10(choose chapter or problem)
The accompanying diagram shows how the free energy, G, changes during a hypothetical reaction A1g2 + B1g2 C1g2. On the left are pure reactants A and B, each at 1 atm, and on the right is the pure product, C, also at 1 atm. Indicate whether each of the following statements is true or false. (a) The minimum of the graph corresponds to the equilibrium mixture of reactants and products for this reaction. (b) At equilibrium, all of A and B have reacted to give pure C. (c) The entropy change for this reaction is positive. (d) The x on the graph corresponds to G for the reaction. (e) G for the reaction corresponds to the difference between the top left of the curve and the bottom of the curve. [Section 19.7]
Questions & Answers
QUESTION:
The accompanying diagram shows how the free energy, G, changes during a hypothetical reaction A1g2 + B1g2 C1g2. On the left are pure reactants A and B, each at 1 atm, and on the right is the pure product, C, also at 1 atm. Indicate whether each of the following statements is true or false. (a) The minimum of the graph corresponds to the equilibrium mixture of reactants and products for this reaction. (b) At equilibrium, all of A and B have reacted to give pure C. (c) The entropy change for this reaction is positive. (d) The x on the graph corresponds to G for the reaction. (e) G for the reaction corresponds to the difference between the top left of the curve and the bottom of the curve. [Section 19.7]
ANSWER:Problem 19.10The accompanying diagram shows how the free energy, G, changes during a hypotheticalreaction A(g) + B(g) C(g). On the left are pure reactants A and B, each at 1 atm, and on theright is the pure product, C, also at 1 atm. Indicate whether each of the following statements istrue or false.(a) The minimum of the graph corresponds to the equilibrium mixture of reactants and productsfor this reaction.(b) At equilibrium, all of A and B have reacted to give pure C.(c) The entropy change for this reaction is positive.(d) The “x” on the graph corresponds to G for the reaction.(e) G for the reaction corresponds to the difference between the top left of the curve and thebottom of the curve. [Section 19.7] Step-by-step solution Step 1 of 5(a)The minimum of the graph represents equilibrium mixture. At this point, the reaction quotient (Q)is equal to the equilibrium constant (K) and the free energy change G is zero.Hence, the given statement is true.