Hum 300 History and Methods of Science
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Why is Graphite so much weaker Graphite , mineral form of carbon
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Graphite is made artificially by baking a mixture of petroleum coke and coal tar pitch at 950 Degree C (174 Degree F ) for 11 to 13 weeks , then transferring the baked product to electric graphitizing furnaces and heating it to about 2800 degree C (5 ,600 Degree F ) for 4 or 5 weeks
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Carbon is Allotropic (That is , it exists in more than one form other forms include Diamond and buckminsterfullurene
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Most of the graphitizing takes place because of the temperature , but the process is also a refining step , as virtually al the metal oxide impurities in the raw carbon are reduced to metal and vaporized
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Paper Topic: Hum 300 History and Methods of Science Code : Hum 300 History and Methods of Science Page 1 Diamonds and Graphite are both made from Carbon Atoms
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Source : Graphite ‘ Microsoft Encarta 2006 (DVD Redmond , WA : Microsoft Corporation , 2005
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A good conductor of electricity , graphite is a poor conductor of heat
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Although , graphite is chemically the same as Diamond , it differs greatly from that mineral in most of its physical properties
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It occurs in nature as a mineral that invariably contains impurities Graphite is widely distributed over the world important deposits are found in China , India , North Korea , Mexico , Brazil , the Czech Republic and Turkey
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Graphite is extremely soft- its hardness rates 1 to 2 or a scale of 1 to 10
