Table 6. Mean Absolute Errors in Heats of Formation and Enthalpy Changes at 298 K (kcal/mol) Calculated with the OMx, OMx-D3T, and ODMx Methods for the G2G3-CHNOF Set and Its Subsets.

subset	N	OM2	OM2-D3T	ODM2	OM3	OM3-D3T	ODM3
Heats of Formation
G2	93	3.37	4.01	3.52	3.83	5.04	3.93
G3	52	3.18	6.30	3.11	3.71	9.24	3.06
ALKANES28	22	1.91	9.24	1.15	0.72	15.76	0.63
Enthalpy Changes at 298 K
ALKANES28	6	0.61	0.21	0.34	1.48	0.90	1.06