A process whereby a material increases in temperature solely due to exothermic reactions between the material and the surrounding atmosphere is known as?

A process whereby a material increases in temperature solely due to exothermic reactions between the material and the surrounding atmosphere is known as?

• A. Self-Heating
• B. Combustion
• C. Spontaneous Ignition
• D. Pyrolysis

Answer: (A)

Self-heating is the process where a material warms up because of exothermic oxidation with the surrounding air. The heat comes from the material’s own chemical reactions with the atmosphere, not from an external heat source. If this heat isn’t dissipated, the temperature can rise to the point of ignition, but the initial concept is the heat generated by oxidation in place. This is different from combustion, which involves rapid burning and a flame; spontaneous ignition is the actual event of ignition due to self-heating; and pyrolysis is thermal decomposition (often without requiring oxidation by air).

Self-heating is the process where a material warms up because of exothermic oxidation with the surrounding air. The heat comes from the material’s own chemical reactions with the atmosphere, not from an external heat source. If this heat isn’t dissipated, the temperature can rise to the point of ignition, but the initial concept is the heat generated by oxidation in place. This is different from combustion, which involves rapid burning and a flame; spontaneous ignition is the actual event of ignition due to self-heating; and pyrolysis is thermal decomposition (often without requiring oxidation by air).