Two molecules of the amino acid glycine join through the
formation of a peptide bond, as shown above. The thermodynamic
data for the reaction are listed in the following table.
AG298
+15
kJ/molrxn
Bond
C-O
N-H
O-H
Bond Energy
(kJ/mol)
360
390
460
AH
+12
kJ/molxn
O 200 kJ/mol
O 300 kJ/mol
298
O 400 kJ/mol
Based on the bond energies listed in the table above, which of the
following is closest to the bond energy of the C-N bond?
AS
-10
J/(K-molrxn)
298