Module 2: Thermodynamics of Combustion
  Lecture 9: Heat of Combustion
 
Heat of formation of important species at 25 °C and 0.1 MPa
Species
Formula
State
Heat of formation (kJ/mol)

Oxygen

O2

Gas

0

Hydrogen

H2

Gas

0

Hydroxyl

OH

Gas

42.3

Water

H2O

Gas

-242

Water

H2O

Liquid

-286

Carbon monoxide

CO

Gas

-110.5

Carbon dioxide

CO2

Gas

-394

Methane

CH4

Gas

-74.5

Propane

C3H8

Gas

-103.8

Butane (n)

C4H10

Gas

-124.7

Kerosene

CH1.842

Liquid

-51.6

Nitrogen dioxide

NO2

Gas

33.9

Nitric acid

NO

Gas

90.4