Purest form of carbon is

    coal burns in air to produce
    when coal burns in air it produces which gas
    when heated in air coal burns to produce
    what happens to coal when it burns
  • Coal burns in air to produce

    • When coal burns in air then.

    When coal burns in air which gas is formed

  • Charcoal burns in air producing
  • When coal burns in air then
  • Coal burns to produce
  • Coal burns with a flame

    • 11.6: Coal - The Carbon Rock of Ages

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    Learning Objectives
    • Describe coal and its processing.
    • List the products of coal burning that promotes pollution.

    Coal is a complex solid material derived primarily from plants that died and were buried hundreds of millions of years ago and were subsequently subjected to high temperatures and pressures.

    It is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified into four main types, or ranks depending on the types and amounts of carbon present and on the amount of heat energy the coal can produce, including anthracite, bituminous, subbituminous, and lignite (highest to lowest ranked, pictured in Figure \(\PageIndex{1}\).

    There are four distinct classes of coal (Table \(\PageIndex{1}\)); their hydrogen and oxygen contents depend on the length of time the coal has been buried and the pressures and temperatures to which it has been subjected.

    The most abundant form in the United States is bituminous coal, which has a high sulfur co

      what is produced from burning coal
      coal burning in air