17.110 Synthetic diamonds are made under conditions of high temperature (2000 K) and high pressure (1010 Pa; 105 atm) in the presence of catalysts. Car- bon's phase diagram is useful for finding the conditions for formation of natural and syn- thetic diamonds. Along the diamond-graphite line, the two allotropes are in equilibrium. (a) At point A, what is the sign of AH for the formation of dia- Diamond A Liquid Graphite Vapor. mond from graphite? Explain. (b) Which allotrope is denser? Explain. Temperature Pressure
17.110 Synthetic diamonds are made under conditions of high temperature (2000 K) and high pressure (1010 Pa; 105 atm) in the presence of catalysts. Car- bon's phase diagram is useful for finding the conditions for formation of natural and syn- thetic diamonds. Along the diamond-graphite line, the two allotropes are in equilibrium. (a) At point A, what is the sign of AH for the formation of dia- Diamond A Liquid Graphite Vapor. mond from graphite? Explain. (b) Which allotrope is denser? Explain. Temperature Pressure
General Chemistry - Standalone book (MindTap Course List)
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Chapter18: Thermodynamics And Equilibrium
Section: Chapter Questions
Problem 18.110QP
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Transcribed Image Text:17.110 Synthetic diamonds are made under conditions of high
temperature (2000 K) and high pressure (1010 Pa; 105 atm) in
the presence of catalysts. Car-
bon's phase diagram is useful
for finding the conditions for
formation of natural and syn-
thetic diamonds. Along the
diamond-graphite line, the two
allotropes are in equilibrium.
(a) At point A, what is the sign
of AH for the formation of dia-
Diamond
A
Liquid
Graphite
Vapor.
mond from graphite? Explain.
(b) Which allotrope is denser?
Explain.
Temperature
Pressure
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