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 magnesium to corrode in air is given by 2Mg + O2-2MgO in which at 298 K, AH = 1204 kJ and AS = - 217.1 J/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) AGixn= O μA Value Units ?

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Make a non-spontaneous process spontaneous
A process that is nonspontaneous can be made spontaneous by coupling it with another process tha is highly spontaneous.
The coupling of nonspontaneous reactions with highly spontaneous ones is important in biological system. The oxidization of glucose, for example, is highly
spontaneous:
C6H12O6(s) + 60₂(g) → 6 CO₂(g) + 6 H₂O(1)
Spontaneous reactions such as this ultimately drive the nonspontaneous reactions necessary to sustain life. Can you use Gibbs free energy, enthalpy, and entropy
to argue this reaction is highly spontaneous?
Transcribed Image Text:Make a non-spontaneous process spontaneous A process that is nonspontaneous can be made spontaneous by coupling it with another process tha is highly spontaneous. The coupling of nonspontaneous reactions with highly spontaneous ones is important in biological system. The oxidization of glucose, for example, is highly spontaneous: C6H12O6(s) + 60₂(g) → 6 CO₂(g) + 6 H₂O(1) Spontaneous reactions such as this ultimately drive the nonspontaneous reactions necessary to sustain life. Can you use Gibbs free energy, enthalpy, and entropy to argue this reaction is highly spontaneous?
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 magnesium to
corrode in air is given by
2Mg + O2-2MgO
in which at 298 K, AH
ASixm 217.1 J/K.
=
= - 1204 kJ and
=
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)
AGrxn =
μÅ
Value
Units
?
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 magnesium to corrode in air is given by 2Mg + O2-2MgO in which at 298 K, AH ASixm 217.1 J/K. = = - 1204 kJ and = 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) AGrxn = μÅ Value Units ?
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