PNG images: Fire collection
Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. Slower oxidation processes like rusting or digestion are not included by this definition.
Fire is hot because conversion of the weak double bond in molecular oxygen, O2, to the stronger bonds in the combustion products carbon dioxide and water releases energy (418 kJ per 32 g of O2); the bond energies of the fuel play only a minor role here. At a certain point in the combustion reaction, called the ignition point, flames are produced. The flame is the visible portion of the fire. Flames consist primarily of carbon dioxide, water vapour, oxygen and nitrogen. If hot enough, the gases may become ionised to produce plasma. Depending on the substances alight, and any impurities outside, the colour of the flame and the fire's intensity will be different.
We currently have 126 Fire transparent PNG images.