What is Ignition Temperature of water..?
Answers
✏️Autoignition, a combustion reaction that makes water vapour as a bi-product, can be achieved by burning hydrogen and oxygen at the same time at 536 degrees Celsius at sea level.
✏️The water temperature will not rise above 212 °F.
✏️This is well below the ignition temperature of paper (about 451 °F).
Water is not combustible, therefore it cannot be ignited. Flammability is the ability of a combustible material with an adequate supply of oxygen to sustain enough heat energy to keep burning after it has been ignited.
However, there is a chemical reaction known as Thermal decomposition in which heat causes a substance to break into its constituents. At high temperatures, the bonds holding the atoms of the original molecules together break down. The reaction usually consumes more heat energy than it releases. One of the many remarkable things about water is that the molecule is very stable and it is hard to get the oxygen away from those two hydrogens.
Water splitting is the general term for a chemical reaction in which water is separated into its constituents - oxygen and hydrogen. For example at ~2000°C about 3% percent of all H2O molecules are dissociated into various combinations of hydrogen and oxygen atoms. At higher temperatures of 3000°C and above, more than half of the water molecules are decomposed.