Problem

Two compounds are isomers if they have the same chemical formula but different arrangement...

Two compounds are isomers if they have the same chemical formula but different arrangements of atoms. Use Table to estimate ΔH for each of the following gas-phase isomerization reactions and indicate which isomer has the lower enthalpy.

Table Average Bond Enthalpies(kJ/mol)

Single Bonds
C–H	413	N–H	391	O–H	463	F–F	155
C–C	348	N–N	163	O—O	146
C–N	293	N–O	201	O–F	190	Cl–F	253
C–O	358	N–F	272	O–Cl	203	Cl–Cl	242
C–F	485	N–Cl	200	O–l	234
C–Cl	328	N–Br	243	Br–F	237
C–Br	276	S–H	339	Br–Cl	218
C–l	240	H–H	436	S–F	327	Br–Br	193
C–S	259	H–F	567	S–Cl	253
H–Cl	431	S—Br	218	I–Cl	208
Si–H	323	H–Br	366	S—S	266	I–Br	175
Si–Si	226	H–l	299	I–l	151
Si–C	301
Si–O	368
Si–Cl	464
Multiple Bonds
C=C	614	N=N	418	O=O	495
C≡C	839	N≡N	941
C=N	615	N=O	607	S=O	523
C≡N	891	S=S	418
C=O	799
C≡O	1072