For the decomposition of solid calcium carbonate at 25 C, CaCO3(s) CaO(s) + CO2(g) (a) Calculate rG using values of fG. Is the reaction product-favored at equilibrium? (b) Calculate rG when the partial pressure of carbon dioxide is 0.10 atm in the presence of both calcium carbonate and calcium oxide. Is the reaction spontaneous under these conditions?

Chemistry & Chemical Reactivity
9th Edition
ISBN:9781133949640
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy
Section: Chapter Questions
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Aren’t caco3 and CaO, why do they have partial pressure
4:25
l 4G
in the forward direction.
Explanation
The A,G° for the given reaction is calculated
below.
Given:
The reactants and the products are mixed
with the partial pressures of 0.10 atm.
A,G° is related to the reaction quotient Q by
the expression,
A,G= A,G +RT InQ
PCaoPcO2
= A;G` +RTln (-
PCACO3
Substituting the respective values,
(0.10 )(0.10
n+ (0.008314 kJ/K) (298.15) In
(0.10 )
+125.69 kJ/mol-rxn
Therefore, the reaction will not proceed
spontaneously in the forward direction since
the A,G° value is positive.
Transcribed Image Text:4:25 l 4G in the forward direction. Explanation The A,G° for the given reaction is calculated below. Given: The reactants and the products are mixed with the partial pressures of 0.10 atm. A,G° is related to the reaction quotient Q by the expression, A,G= A,G +RT InQ PCaoPcO2 = A;G` +RTln (- PCACO3 Substituting the respective values, (0.10 )(0.10 n+ (0.008314 kJ/K) (298.15) In (0.10 ) +125.69 kJ/mol-rxn Therefore, the reaction will not proceed spontaneously in the forward direction since the A,G° value is positive.
4:25
l 4G
Textbook
problem
Principles Of Chemical
Reactivity: Entropy And Free
Energy
For the decomposition of solid
calcium carbonate at 25 C,
CaCO3(s) CaO(s) + CO2(g) (a)
Calculate rG using values of fG.
Is the reaction product-favored at
equilibrium? (b) Calculate rG
when the partial pressure of
carbon dioxide is 0.10 atm in the
presence of both calcium
carbonate and calcium oxide. Is
the reaction spontaneous under
these conditions?
Transcribed Image Text:4:25 l 4G Textbook problem Principles Of Chemical Reactivity: Entropy And Free Energy For the decomposition of solid calcium carbonate at 25 C, CaCO3(s) CaO(s) + CO2(g) (a) Calculate rG using values of fG. Is the reaction product-favored at equilibrium? (b) Calculate rG when the partial pressure of carbon dioxide is 0.10 atm in the presence of both calcium carbonate and calcium oxide. Is the reaction spontaneous under these conditions?
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