Gibbs Energy Data

Question

Gibbs Energy Data

pbag (Chemical)

(OP)

23 Sep 03 08:03

Can anyone suggest me the source of Gibbs Energy Data in general & for FeO, H2CO3 & FeCO3 in particular.

Thanx
Pawan

25362 (Chemical) · Answer 1 · 2003-09-23 09:12:01

Gibbs molar energies of formation can be found in CRC's Handbook of Chemistry and Physics as well as in Lange's Handbook of Chemistry. The first gives

For solid FeO in the range of 300-1800 K:
-270590+72.64T-1.26TlogT J/mol
For the same in the range of 1800-2000 K:
-259034-23.42T+10.69TlogT J/mol

Lange's Handbook gives dG_f, @ 25 deg C,
for
FeCO₃: -666.7 kJ/mol
for
H₂CO₃, std. state, aq: -623.16 kJ/mol
for
FeO: -251.4 kJ/mol

pbag (Chemical) · Answer 2 · 2003-09-24 00:54:08

Thanx a lot (25362) for nicely provided values apart from their sources.

Pawan

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Gibbs Energy Data