Consider this rxn which has a DG° = +0.4 kJ/mol. A + B « C + D 1 M A,1 M B,0.1 M C and 0.1 M D are added to a container at room temperature.Which of the following statements is true? A) DG 0 (i.e., it's positive) D) Cannot be determined from the information provided.

Question

Consider this rxn which has a DG° = +0.4 kJ/mol. A + B « C + D
1 M A,1 M B,0.1 M C and 0.1 M D are added to a container at room temperature.Which of the following statements is true?
A) DG < 0 (i.e., it's negative)
B) DG = 0
C) DG > 0 (i.e., it's positive)
D) Cannot be determined from the information provided.

Quizplus · Accepted Answer

The reaction quotient Q = [C][D]/[A][B] = (0.1)(0.1)/(1)(1) = 0.01. Since DG° = +0.4 kJ/mol, the reaction is not spontaneous under standard conditions. However, because Q < 1, the reaction will proceed forward to reach equilibrium, making DG < 0.

Consider This Rxn Which Has a DG° = +0