The internal energy of a diamond is lower than that of graphite. Diamond has more stable and compact structure, so the volume is smaller. However, the atoms in graphite are able to move within their lattice so entropy is higher. … Diamond can still be more stable than graphite under high pressure.
Why does diamond have less entropy than graphite?
Diamond is crystalline solid which is highly ordered structure while such arrangements are not found in the graphite. … Hence, an entropy of the diamond is lesser than graphite.
Does graphite or diamond have greater entropy?
Graphite has more entropy than diamond because Graphite has free electrons(as free electrons are there energy can be distributed more) but diamond lack in free electrons. Hence, Graphite shows more entropy.
Does Diamond have low entropy?
Once diamond is formed, therefore, it cannot reconvert back to graphite because the barrier is too high. So diamond is said to be metastable, since it is kinetically stable, not thermodynamically stable. Quora User’s answer to Both diamond and graphite are made from carbon.
Why is diamond stable?
At high pressure, diamond is the most stable configuration of pure carbon and not graphite. … Also note that since diamond is made out of carbon, diamond can burn just like coal. Therefore, if enough oxygen is present, diamond at high temperature will combust to form carbon dioxide rather than transform into graphite.
Can graphite be converted into diamond?
It is known that graphite can be converted into diamond when subjected to high pressure and high temperatures. The graphite-diamond transformation can be achieved directly by subjecting graphite to ultra high pressures (> 100 kbar) and temperatures ( > 2000°C).
Is diamond or graphite More ordered?
Notice that the entropy of graphite is larger than that of diamond; this is due again to diamond’s compact crystal lattice. In other words, it is much more ordered than the graphite structure.
Is graphite to diamond endothermic?
The conversion of diamond into graphite is an endothermic reaction.
Why is graphite stable than diamond?
Diamond does not contain any delocalised electrons. Graphite containes one delocalised electron per carbon. These cause greater attraction between carbon atoms hence giving stronger bonds, more stability to the structure.
What is the heat of reaction in going from graphite to diamond?
Graphite is a soft, black, slippery substance used for lubrication and as pencil “lead;” Diamond is a brilliant, crystal-clear substance used for gemstones and as an industrial abrasive. The enthalpies of combustion for graphite and for diamond are, respectively, —394 kJ/mol and —396 kJ/mol.
How long can a diamond last?
You see, all the Diamonds in the Jewelry Stores Today were Created Billions of years ago. So for a Diamond to Last for a Billion Years, that Pretty Much says “YES, Diamonds DO Last Forever!” After all, Diamonds are the Hardest Known Substance made in Nature (a 10 on the Moh’s Scale).
Is a diamond really forever?
Diamonds, which form eight-sided crystals called octahedrons, can be billions of years old, Dr. Harlow said. They are datable by minute inclusions of other minerals, retained inside them since they were formed deep in the Earth. … “They are not inert, but may deform and crystallize again.”
Which is the lowest entropy?
Solids have the fewest microstates and thus the lowest entropy.
How much are real diamonds worth?
Diamond Price Chart
|Diamond Carat Weight||Price (Per Carat, Round Brilliant Cut)||Total Price|
|1.0 carat||$2,500 – $18,000||$2,500 – $18,000|
|1.50 carat||$3,300 – $24,000||$4,400 – $32,000|
|2.0 carat||$4,200 – $29,000||$8,400 – $58,000|
|3.0 carat||$7,200 – $51,000||$21,600 – $153,000|
How can you tell if a rock is a diamond?
The only hardness test that will identify a diamond is scratching corundum. Corundum, which includes all rubys and sapphires, is 9 on the hardiness scale. If your suspected diamond crystal can scratch corundum, then there is a good chance that you found a diamond. But NO OTHER HARDNESS TEST will identify a diamond.
Can a diamond conduct electricity?
Diamond is a form of carbon in which each carbon atom is joined to four other carbon atoms, forming a giant covalent structure. … It does not conduct electricity as there are no delocalised electrons in the structure.