Part A 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) μA AG-89 kJ Submit Previous Answers X Incorrect; Try Again; 4 attempts remaining ▾ 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) D HA ? 1

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Chapter16: Thermodynamics: Directionality Of Chemical Reactions
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Gibbs free energy (G) is a measure of the spontaneity of a chemical reaction. It is the
chemical potential for a reaction, and is minimized at equilibrium. It is defined as
G=H-TS
where H is enthalpy, T' is temperature, and S is entropy.
The chemical reaction that causes aluminum to corrode in air is given by
4A1+30₂-2Al₂O₁
in which at 298 K, AH =
-3352 kJ and AS = -625.1J/K
Part A
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)
μA
AG - 89
kJ
Submit Previous Answers
X Incorrect; Try Again; 4 attempts remaining
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)
?
AG= Value
Units
Submit
Transcribed Image Text:Gibbs free energy (G) is a measure of the spontaneity of a chemical reaction. It is the chemical potential for a reaction, and is minimized at equilibrium. It is defined as G=H-TS where H is enthalpy, T' is temperature, and S is entropy. The chemical reaction that causes aluminum to corrode in air is given by 4A1+30₂-2Al₂O₁ in which at 298 K, AH = -3352 kJ and AS = -625.1J/K Part A 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) μA AG - 89 kJ Submit Previous Answers X Incorrect; Try Again; 4 attempts remaining 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) ? AG= Value Units Submit
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