For the oxidation of F e and A l balanced equation has to be written and using the Δ G f 0 values it has to be determined whether this process is spontaneous at 25 o C . Concept introduction: Oxidation: The gain of oxygen or the loss of hydrogen or the loss of an electron in a species during a redox reaction is called oxidation. Reduction: The loss of oxygen or the gain of hydrogen or gain of an electron in a species during a redox reaction is called reduction. Free energy (Gibbs free energy ) is the term that is used to explain the total energy content in a thermodynamic system that can be converted into work. The free energy is represented by the letter G . All spontaneous process is associated with the decrease of free energy in the system. The standard free energy change (ΔG ° rxn ) is the difference in free energy of the reactants and products in their standard state. ΔG ° rxn = ∑ nΔG f ° (Products)- ∑ nΔG f ° (Reactants)

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Chapter 20, Problem 20.102P

Interpretation Introduction

Interpretation:

For the oxidation of Fe and Al balanced equation has to be written and using the ΔGf0 values it has to be determined whether this process is spontaneous at 25oC.

Concept introduction:

Oxidation: The gain of oxygen or the loss of hydrogen or the loss of an electron in a species during a redox reaction is called oxidation.

Reduction: The loss of oxygen or the gain of hydrogen or gain of an electron in a species during a redox reaction is called reduction.

Free energy (Gibbs free energy) is the term that is used to explain the total energy content in a thermodynamic system that can be converted into work. The free energy is represented by the letter G. All spontaneous process is associated with the decrease of free energy in the system. The standard free energy change (ΔG°rxn) is the difference in free energy of the reactants and products in their standard state.

ΔG°rxn=∑nΔGf°(Products)-∑nΔGf°(Reactants)

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