Steel wool burning in oxygen. Steel wool is made of very thin bundled steel filaments (25 micron thickness used here). A wad of steel wool burns brightly is an Erlenmeyer flask filled with pure oxygen. In this combustion reaction a mixture of different iron oxides is produced (FeO, Fe2O3, Fe3O4). The rate of the reaction is much higher in pure oxygen as compared to air, where the concentration of oxygen (O2) is about 20%. | |
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Crédit: | Science Photo Library / Turtle Rock Scientific |
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