The Δ r G ° for the given reaction should be calculated using Δ f G ° values and identified that reaction is product favoured at equilibrium. Concept introduction: The Gibbs free energy or the free energy change is a thermodynamic quantity represented by Δ r G ° . 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 ° is 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
The Δ r G ° for the given reaction should be calculated using Δ f G ° values and identified that reaction is product favoured at equilibrium. Concept introduction: The Gibbs free energy or the free energy change is a thermodynamic quantity represented by Δ r G ° . 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 ° is 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
Solution Summary: The author explains the Gibbs free energy, which is a thermodynamic quantity, and is related to the reaction quotient Q.
Science that deals with the amount of energy transferred from one equilibrium state to another equilibrium state.
Chapter 18, Problem 31PS
(a)
Interpretation Introduction
Interpretation:
The ΔrG° for the given reaction should be calculated using ΔfG° values and identified that reaction is product favoured at equilibrium.
Concept introduction:
The Gibbs free energy or the free energy change is a thermodynamic quantity represented by ΔrG°. 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)
ΔrG° is related to the reaction quotient Q by the expression,
ΔrG = ΔrG°+ RT lnQ
For a general reaction, aA + bB →cC + dD
Q = [C]c[D]d[A]a[B]b
(b)
Interpretation Introduction
Interpretation:
The ΔrG° for the given reaction should be calculated when both reactants and product are present at partial pressure of 0.10atm and should be identified that the reaction is spontaneous under such conditions.
Concept introduction:
The Gibbs free energy or the free energy change is a thermodynamic quantity represented by ΔrG°. 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)
ΔrG° is related to the reaction quotient Q by the expression,
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The Laws of Thermodynamics, Entropy, and Gibbs Free Energy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=8N1BxHgsoOw;License: Standard YouTube License, CC-BY