The equilibrium constant for the given reaction 2H 2 O ( l ) ⇄ 2H 2 ( g ) + O 2 ( g ) should be determined at 25 o C . 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 ) ΔG o is related to the equilibrium constant K by the equation, Δ r G o = -RTlnK p . The rearranged expression is, K p = e - Δ r G o RT

BuyFind

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781337399074
BuyFind

Chemistry & Chemical Reactivity

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

Solutions

Chapter 18.6, Problem 18.8CYU
Interpretation Introduction

Interpretation:

The equilibrium constant for the given reaction 2H2O(l)2H2(g)+ O2(g) should be determined at 25oC.

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°fG°(products)fG°(reactants)

ΔGo is related to the equilibrium constant K by the equation,

  ΔrGo= -RTlnKp.

The rearranged expression is,

  Kp= e-ΔrGoRT

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