At what temperature Teq do the forward and reverse corrosion reactions occur in equilibrium? Teq=△H/△S Use the information given.

Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter13: Spontaneous Processes And Thermodynamic Equilibrium
Section: Chapter Questions
Problem 66CP
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At what temperature Teq do the forward and reverse corrosion reactions occur in equilibrium?

Teq=△H/△S

Use the information given.

What is the standard Gibbs free energy for this reaction? Assume the commonly used
standard reference temperature of 298 K.
Express your answer as an integer and include the appropriate units.
View Available Hint(s)
AGxn
-3166 kJ
%3D
Submit
Previous Answers
Correct
It makes sense that the rusting reaction has a negative Gibbs free energy value
because rusting occurs spontaneously. However, notice that the entropy change
for this reaction is not favored (7 moles going to 2 moles and a negative AS
value). The reason that this reaction is nonetheless spontaneous at room
temperature is the large negative value for enthalpy.
Part B
What is the Gibbs free energy for this reaction at 5975 K ? Assume that AH and AS do
not change with temperature.
Express your answer to two decimal places and include the appropriate units.
• View Available Hint(s)
AGrxn
383 kJ
Transcribed Image Text:What is the standard Gibbs free energy for this reaction? Assume the commonly used standard reference temperature of 298 K. Express your answer as an integer and include the appropriate units. View Available Hint(s) AGxn -3166 kJ %3D Submit Previous Answers Correct It makes sense that the rusting reaction has a negative Gibbs free energy value because rusting occurs spontaneously. However, notice that the entropy change for this reaction is not favored (7 moles going to 2 moles and a negative AS value). The reason that this reaction is nonetheless spontaneous at room temperature is the large negative value for enthalpy. Part B What is the Gibbs free energy for this reaction at 5975 K ? Assume that AH and AS do not change with temperature. Express your answer to two decimal places and include the appropriate units. • View Available Hint(s) AGrxn 383 kJ
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