If methane burns with oxygen and form carbon dioxide and water,so why the carbon dioxide doesn't extinguish heat produced .
Not enough of it AND the convection currents don't allow the CO2 to immerse the flame.
Good question! Carbon dioxide is a product of the combustion reaction between methane and oxygen. While carbon dioxide is not a fuel and cannot sustain a fire, it does not completely extinguish the heat produced for a few reasons:
1. Carbon dioxide is a non-reactive gas: Unlike oxygen, carbon dioxide is not reactive with the fuel. Oxygen sustains the combustion reaction by getting involved in the reaction, while carbon dioxide is an inert byproduct. It does not interfere with the combustion process, so the heat generated during the reaction is not affected.
2. Oxygen requirement: Combustion reactions require an oxidizer, typically oxygen, to support the reaction. Carbon dioxide does not fulfill this role. Once enough oxygen molecules are present, the reaction will continue to produce heat until the fuel or oxygen is depleted.
3. Dilution effect: Although carbon dioxide does not directly interfere with the heat produced, it can have an indirect effect. As carbon dioxide is produced, it displaces oxygen in the surrounding environment, potentially decreasing the amount of oxygen available to support the combustion reaction. However, this dilution effect alone is often not sufficient to completely extinguish the heat generated.
4. Heat transfer: Heat can transfer by conduction, convection, and radiation. Even when carbon dioxide is formed, it does not inhibit the transfer of heat through these mechanisms. The heat energy will continue to radiate from the burning substance, allowing the fire to persist until the fuel or oxygen is exhausted.
In summary, while carbon dioxide is a byproduct of the combustion process, it does not extinguish the heat generated because it is non-reactive, not an oxidizer, and does not directly interfere with heat transfer.