Answer the following questions on the basis of the free energies of formation at 25°C shown in the table at the top of the next page: (a) Does the peptide bond between alanine and glycine form spontaneously under standard conditions?

World of Chemistry
7th Edition
ISBN:9780618562763
Author:Steven S. Zumdahl
Publisher:Steven S. Zumdahl
Chapter21: Biochemistry
Section: Chapter Questions
Problem 8A
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Answer the following questions on the basis of the free energies of formation
at 25°C shown in the table at the top of the next page:
(a) Does the peptide bond between alanine and glycine form spontaneously
under standard conditions?
Transcribed Image Text:Answer the following questions on the basis of the free energies of formation at 25°C shown in the table at the top of the next page: (a) Does the peptide bond between alanine and glycine form spontaneously under standard conditions?
SUBSTANCE
AG}/kcal mol
DL-alanine (aq)
DL-alanylglycine (aq)
Glycine (aq)
H2O (1)
-89.11
- 114.57
-89.14
- 56.69
(b) Suppose alanine and glycine have the same concentration in aqueous solu-
tion. At equilibrium, what would be the ratio of concentrations of peptide to
one of the amino acids?
Transcribed Image Text:SUBSTANCE AG}/kcal mol DL-alanine (aq) DL-alanylglycine (aq) Glycine (aq) H2O (1) -89.11 - 114.57 -89.14 - 56.69 (b) Suppose alanine and glycine have the same concentration in aqueous solu- tion. At equilibrium, what would be the ratio of concentrations of peptide to one of the amino acids?
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