Consider the reaction: C H 3 O H ( g ) → C O ( g ) + 2 H 2 ( g ) Calculate Δ G for this reaction at 25 0 C under the following conditions. P C H 3 O H = 0.855 a t m P C O = 0.125 a t m P H 2 = 0.183 a t m Concept Introduction: Δ G o = Σ n Δ G f o ( p r o d u c t s ) – Σ n Δ G f o ( reactants ) ] = [ 1 m o l × Δ G f o ( C O ( g ) ) + 2 m o l × Δ G f o ( H 2 ( g ) ) ] – [ 1 m o l × Δ G f o ( C H 3 O H ( g ) ) ] = [ 1 m o l × ( – 137.2 kJ/mol ) + 2 m o l × ( 0 kJ/mol ) ] – [ 1 m o l × ( – 162.3 kJ/mol ) ] = + 25.1 k J

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Chapter 17, Problem 67E

Interpretation Introduction

Interpretation: Consider the reaction:

CH3OH(g) → CO(g) + 2H2(g)

Calculate ΔG for this reaction at 25⁰C under the following conditions.

PCH3OH=0.855 atm PCO=0.125 atm PH2=0.183 atm

Concept Introduction:

ΔGo= ΣnΔGfo(products)– ΣnΔGfo(reactants)]=[1 mol × ΔGfo (CO(g)) + 2 mol × ΔGfo(H2(g))]–[1 mol×ΔGfo(CH3OH(g))]=[1 mol × (–137.2 kJ/mol)+ 2 mol × (0 kJ/mol)]–[1 mol× (–162.3 kJ/mol)]=+25.1 kJ

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