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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Calculate the standard free energy change for the oxidation of 1.00 mol of SO2(g) to form SO3(g) using values of ΔfG°.

Interpretation Introduction

Interpretation:

The standard free energy change for oxidation of one mole SO2(g) should be calculated using ΔfGo.

Concept introduction:

The Gibbs free energy or the free energy change is a thermodynamic quantity represented by ΔGo. It can be calculated in a similar manner as entropy and enthalpy. The expression for the free energy change is:

  ΔrG°=fG°(products)-fG°(reactants)

Explanation

The standard free energy change for the oxidation of SO2(g) is calculated below.

Given: Oxidation of 1molSO2(g) forms SO3(g)

The balanced reaction is SO2(g)+12O2(g)SO3(g).

The Appendix L was referred for the values of standard free energy.

  SO2(g)+12O2(g)SO3(g)ΔfG°(kJ/mol)-300.130-371.04

  ΔrG°=fG°(products)-fG°(reactants)

  ΔrG°=[(1 mol SO3(g)/mol-rxn)Δ<

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