Question

What would you observe when Diamonds are heated at high temperature in the absence of oxygen ?

Answer 1

Answer:

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if you heat diamond at open air it will start to burn around 700 degrees Celsius, reacting with oxygen to produce carbon dioxide gas. In the absence of oxygen it will transform into graphite, a more stable form of carbon, long before turning into graphite.

Answer 2

• In non-oxidizing conditions under normal pressure, diamonds can be heated to about 1,900° Celsius (3,452° Fahrenheit) before changing their crystal structure.
• In non-oxidizing conditions at extremely high pressure (197,385 atmospheres), diamonds can withstand temperatures of up to 3,500° Celsius (6,332° Fahrenheit) before changing their crystal structure.

In the absence of oxygen, diamonds can be heated to much higher temperatures. Above the temperatures listed below, diamond crystals transform into graphite. The ultimate melting point of diamond is about 4,027° Celsius (7,280° Fahrenheit).