2. Heat of combustion. The excess energy liberated as heat and also light many times during oxidation.

3. Exothermic. Reactions such as heat of combustion, with such things as methane.

Endothermic: When something needs more energy then what is liberated.

Some common words found in the essay are:
Pyrolysis Decomposition, Exothermic Reactions, , ignition temperature, energy liberated, heat combustion, form mixture, concentration range,
Approximate Word count = 298
Approximate Pages = 1 (250 words per page double spaced)