# The Δ r G ° for the given reaction N 2 ( g ) +O 2 ( g ) ⇄ 2NO ( g ) should be calculated using standard free energies of reactant and product formation and should be identified that whether reaction is reactant or product favoured. Concept introduction: The Gibbs free energy or the free energy change is a thermodynamic quantity represented by Δ r G o . It can be calculated in a similar manner as entropy and enthalpy. The expression for the free energy change is: Δ r G ° = ∑ nΔ f G ° ( products ) - ∑ nΔ f G ° ( reactants ) Δ r G o gets related to the reaction quotient Q by the expression Δ r G = Δ r G ° + RT lnQ For a general reaction, aA + bB → cC + dD Q = [ C ] c [ D ] d [ A ] a [ B ] b ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640 ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter 18.7, Problem 6CYU

(a)

Interpretation Introduction

## Interpretation:The ΔrG° for the given reaction N2(g)+O2(g)⇄2NO(g) should be calculated using standard free energies of reactant and product formation and should be identified that whether reaction is reactant or product favoured.Concept introduction:The Gibbs free energy or the free energy change is a thermodynamic quantity represented by ΔrGo. It can be calculated in a similar manner as entropy and enthalpy.  The expression for the free energy change is:  ΔrG°= ∑nΔfG°(products)- ∑nΔfG°(reactants)ΔrGo gets related to the reaction quotient Q by the expression ΔrG = ΔrG°+ RT lnQFor a general reaction, aA + bB→cC + dD  Q = [C]c[D]d[A]a[B]b

(b)

Interpretation Introduction

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