Diamond and graphite are two crystalline forms of carbon. At 1 atm and 25°C, diamond changes to
graphite so slowly that the enthalpy change of the process must be obtained indirectly. Determine A
Hrxn for
C(diamond)
C(graphite)
with equations from the following list:
(1) C(diamond) + O₂(g) → CO₂(g)
(2) 2 CO₂(g) → 2 CO(g) + O₂(g)
(3) C(graphite) + O₂(g) → CO₂(g)
(4) 2 CO(g) → C(graphite) + CO₂(g)
AHoverall
KJ
AH = -395.4 kJ
AH= 566.0 kJ
AH=-393.5 kJ
AH = -172.5 kJ
