Random chemistry cannot be quantified. To attempt an analysis that means something in terms of when it will start, how it will proceed, and what conditions must be present is possible, but the truth is it happens across a variety of materials and circumstances. Oxidation is interesting in that it can be a very slow process like rusting of iron, or it can be near instantaneous, like TNT. When heat is applied the process moves faster. Heat is generated by the process (exothermic reaction) if the heat is unable to escape fast enough to stabilize the temperature, the process rapidly enters a runaway reaction that often starts visible flame and consumes other combustibles near or in contact. I have seen steaming heaps of steel swarf (chips and curls from mill work, usually with oil on them) that were rusting radically. I have seen wet soybean bales in the interior of an open stack that were nothing but ash when uncovered. Cotton is mostly cellulose, Nitrogen, carbon, and oxygen in combinations are easily ignited (gun cotton is cellulose nitrate). Flash point is the temperature that flame based decomposition happens. The variety of materials on and in a rag pile are too complex to formulate a response that has meaning. Jim
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Today's Featured Article - Tractor Profile: Allis-Chalmers Model G - by Staff. The first Allis-Chalmers Model G was produced in 1948 in Gasden, Alabama, and was designed for vegetable gardeners, small farms and landscape businesses. It is a small compact tractor that came with a complete line of implements especially tailored for its unique design. It featured a rear-mounted Continental N62 four-cylinder engine with a 2-3/8 x 3-1/2 inch bore and stroke. The rear-mounted engine provided traction for the rear wheels while at the same time gave the tractor operator a gre
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