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Multiple Choice
Molecules A and B contain 110 kcal/mol of free energy, and molecules B and C contain 150 kcal/mol of energy. A and B are converted to C and D. What can be concluded?
A
A and B will be converted to C and D with a net release of energy.
B
The conversion of A and B to C and D is exergonic; the products are less organized than the reactants.
C
The conversion of A and B to C and D is spontaneous.
D
The entropy in the products, C and D, is higher than in the reactants, A and B.
E
The reaction that proceeds to convert A and B to C and D is endergonic; the products are more organized than the reactants.
Verified step by step guidance
1
Identify the free energy of the reactants and products: Molecules A and B together have 110 kcal/mol, while molecules B and C together have 150 kcal/mol.
Calculate the change in free energy (ΔG) for the reaction: Subtract the free energy of the reactants from the free energy of the products. This is ΔG = (Energy of C and D) - (Energy of A and B).
Determine the nature of the reaction based on ΔG: If ΔG is positive, the reaction is endergonic, meaning it requires energy input and the products are more organized than the reactants.
Consider the organization and entropy: In an endergonic reaction, the products are typically more organized, which means the entropy (disorder) of the products is lower than that of the reactants.
Conclude the characteristics of the reaction: Since the reaction is endergonic, it is not spontaneous, and the products (C and D) are more organized than the reactants (A and B).