Heating marble

Heating marble

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Credit: SCIENCE PHOTO LIBRARY

Caption: Heating marble. Chip of marble (calcium carbonate, CaCO3) being heated by the flame of a bunsen burner to produce lime or quicklime (calcium oxide, CaO) and carbon dioxide gas (CO2). Lime is produced commercially by decomposing calcium carbonate at temperatures of 900-1200 degrees Celsius. Calcium carbonate occurs naturally in a number of forms, including limestone, chalk and calcite.

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Keywords: black background, bunsen burner, burning, calcium carbonate, calcium oxide, carbon dioxide, chemical, chemistry, close-up, combustion, detail, experiment, flame, gauze, heat, heated, heating, hot, lab, laboratory, laboratory equipment, lime, marble, mineral, oxidation, oxidising, quicklime, reacting, reaction, rock, school science, studio shot, tripod

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