Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 23 views

    Forms of Carbon

    Uploaded by

    Alyssa Mari Reyes
    Carbon exists in several allotropic forms including diamond, graphite, and amorphous carbon. Diamond is extremely hard, dense, and thermally conductive. Graphite is soft, lubricating, and electrically conductive. Amorphous carbon includes charcoal, coke, bone black, lampblack, and carbon black which are used as fuels, industrial reagents, and pigments.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd

    Forms of Carbon

    Uploaded by

    Alyssa Mari Reyes
    23 views19 pages
    Carbon exists in several allotropic forms including diamond, graphite, and amorphous carbon. Diamond is extremely hard, dense, and thermally conductive. Graphite is soft, lubricating, and electrically conductive. Amorphous carbon includes charcoal, coke, bone black, lampblack, and carbon black which are used as fuels, industrial reagents, and pigments.

    Original Description:

    Forms of Carbon

    Copyright

    © © All Rights Reserved

    Available Formats

    PPTX, PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    Carbon exists in several allotropic forms including diamond, graphite, and amorphous carbon. Diamond is extremely hard, dense, and thermally conductive. Graphite is soft, lubricating, and electrically conductive. Amorphous carbon includes charcoal, coke, bone black, lampblack, and carbon black which are used as fuels, industrial reagents, and pigments.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    23 views19 pages

    Forms of Carbon

    Uploaded by

    Alyssa Mari Reyes
    Carbon exists in several allotropic forms including diamond, graphite, and amorphous carbon. Diamond is extremely hard, dense, and thermally conductive. Graphite is soft, lubricating, and electrically conductive. Amorphous carbon includes charcoal, coke, bone black, lampblack, and carbon black which are used as fuels, industrial reagents, and pigments.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 19

    Allotropic forms of carbon

    • Allotropy- the existence of an


    element in two or more forms
    in the same physical state.
    - it is due to the existence of
    two or more kinds of
    molecules in a crystal.
    Diamond
    • One of the hardest materials. It is the densest
    form of carbon, about 3.5 times as dense as
    water.
    • Each carbon atom is tetrahedrally oriented to
    its four nearest neighbors.
    • It is a macromolecule,which accounts for its
    extremely high melting point,above 3500
    Uses of Diamond

    • It is use as a gem.
    • It is use for cutting and drilling
    because of its extreme
    hardness.
    • It is a nonconductor of
    electricity.
    Graphite

    • It is soft,easili crumbled and


    has a greasy feel.
    • The carbon atoms in graphite
    are arranged in layers of thin
    hexagonal plates.
    Uses of Graphite
    • It is used as lubricant
    • Graphite is also used for the electrodes of
    electric furnaces
    • It is used in making “lead” in pencils,graphite
    is powdered,mixed with clay and then formed
    into sticks.
    • It is also used as moderator in nuclear
    reactors.
    Amorphous form of Carbon

    • Amorphous carbon -carbons with


    no definite crystalline form .
    When the substances which
    contain combined carbon are
    heated,they produce black
    residues.
    • Some amorphous carbon are
    prepared by destructive distillation
    • Destructive distillation is a process
    wherein a wood or bituminous coal
    is heated in a closed container
    without access to air or oxygen,it
    decomposes into simpler substances.
    Charcoal
    • Prepared commercially by heating wood in
    closed retorts.
    • It is a porous,black,brittle solid that is odorless
    and tasteless.
    • It is denser than water,but it often adsorbs
    enough gas to make it float on water.
    • Charcoal is used as deodorizer,fuel
    Coke

    • It is a gray solid that is harder and


    denser than charcoal.
    • Coke is an excellent reducing
    agent,it is widely used in the
    smelting of metals since many of
    the ores of iron,tin,copper and
    converted into oxides.
    Boneblack
    • Animal charcoal,it is produced by the
    destructive distillation of bones.
    • It is used as an adsorbent to
    decolorize liquids.
    In sugar refineries,sugar solutions
    are decolorized by passing them
    through large tanks partially filled
    with boneblack.
    Lampblack

    • It forms a velvety black


    powder on cool surfaces near
    the flame.
    • It is used in printer’s ink,shoe
    polish,carbon paper and black
    varnish and paint.
    Carbon Black

    • It is made by burning natural gas


    in an insufficient supply of air.
    • It is used in making automobile
    tires.It helps to preserve the
    rubber and makes the tires wear
    longer.

    You might also like