Originally posted by Magnon
Thanks. 🙂The person compressing coal into diamond would need to apply 100 metric tons / square-centimeter. The total palm surface area of super-ppl is maybe around 300 cm^2. If they can produce 100 tons/cm^2 they would be able to lift approx. 300 cm^2*100 tons/cm^2 = [B]30000 tons
.Classic Thing was a 80-tonner, so he wouldn't be nearly strong enough (80 << 30000). Neither would classic Hulk or Thor (100+ tonners). [/B]
You're typing nonsense.
Originally posted by MrMind
they wouldn't make it even if they have the strength, turning coal into diamond requires extreme heat and pressure, it also requires timepeople put coal in temperature above 1000ºC for couple weeks under heavy pressure to make industrial grade aritificial diamond, most results in brown/yellowish diamond crystal
I found an experimental phase diagram of carbon (below). It tells us which form of carbon is stable at different temperatures and pressures:
On the vertical axis (y-axis) there is pressure in kbars (pressure increases upwards), and on the horizontal axis (x-axis) there is temperature in thousands of kelvins. We can see that at low pressures and temperatures, graphite is stable, and at high enough pressures (= we go upwards along the y-axis) diamond becomes the preferred form.
Earlier in this thread, I calculated the minimum graphite-to-diamond phase transition pressure at room temperature to be approximately 15 140 atm = 15.3 kbar. T(room temp) = 0.3 in the Figure, since the x-unit is 1000 K. We can now compare my theoretical value with the experimental value from the Figure. We need to start at T = 0.3 on the x-axis (graphite region) and move upwards at this fixed temp. until we reach the gra/dia phase boundary. According to the Fig, this occurs approximately at a pressure P = 10^1.2 kbar = 15.8 kbar. This is very close to the theoretical value 15.3 kbars which I calculated earlier.
We can see that at higher temperatures, say T = 2.0 or 3.0 (*1000 K), one actually needs HIGHER pressure to convert graphite to diamond. The 24 black dots in the Fig represent conditions under which graphite can be catalytically changed into diamond. And the shaded region represents the conditions under which this change occurs directly without catalyst (in a "reasonable" time).
The required temperatures are between 1.0 and 2.0 (i.e. 1000 to 2000 kelvins) even when a catalyst is used to accelerate the conversion. The required pressure is then higher than at r.t. but nevertheless these elevated temperatures are needed in order for the phase change to occur fast enough to be useful.