what is combustion
COMBUSTION IS DEFINED AS THE PROCESS OF BURNING OF A SUBSTANCE IN THE PRESENCE OF AIR OR OXYGEN WITH THE LIBERATION OF HEAT AND LIGHT . SUBSTANCES CAN BE CLASSIFIED INTO COMBUSTIBLE SUBSTANCES AND NON - COMBUSTIBLE SUBSTANCES . COMBUSTION IS OF THREE TYPES - RAPID COMBUSTION , EXPLOSION AND SPONTANEOUS COMBUSTION . IT CAN ALSO BE DIVIDED INTO COMPLETE AND INCOMPLETE COMBUSTION .