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Chemistry Reference Data

Average Single Bond Energies (kJ/mol) at 25°C

	H	C	N	O	S	F	Cl	Br	I	Si	P
H	432	413	391	467	347	565	427	363	295	323	320
C		347	305	358	259	453	339	276	216	301	264
N			160	201	-----	272	200	243	159	-----	209
O				204	265	190	203	234	234	368	351
S					266	327	271	218	170	226	-----
F						159	193	212	263	565	490
Cl							243	215	208	381	331
Br								193	175	310	272
I									151	234	184
Si										226	213
P											200

Average Multiple Bond Energies (kJ/mol) at 25°C

	C	N	O	S
C=	614	615	745	477
N=		418	607
O=			498	498
C	839	891	1070
N		945

The C=O energy in CO2 is 799 kJ/mol.

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Prepared with the support and help of the North Carolina Department of Public Instruction.






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