
(a)
Interpretation:
For the following reaction, the
Concept introduction:
Entropy is the measure of randomness in the system. Standard entropy change in a reaction is the difference in entropy of the products and reactants.
Where,
Standard entropy change in a reaction and entropy change in the system are same.
(a)

Answer to Problem 20.95P
The standard entropy changes of the given reaction value is
Explanation of Solution
The given equilibrium reaction is,
Entropy change
Calculate the change in entropy for this reaction as follows,
Calculate the change in entropy for this reaction as follows
Substituting the values of standard entropy
The standard entropy of the reaction
(b)
Interpretation:
For the following reaction, the
Concept introduction:
Free energy change
Where,
(b)

Answer to Problem 20.95P
Given reaction the standard free
Explanation of Solution
The given equilibrium reaction is,
Solving for
Calculate the
Therefore, the given reaction
(c)
Interpretation:
For the following reaction, the
Concept introduction:
Free energy change is the term that is used to explain the total energy content in a
Where,
(c)

Answer to Problem 20.95P
Given reaction enthalpy
Explanation of Solution
The given equilibrium reaction is,
Calculation for enthalpy change
Standared Free energy change equation is,
Calcualted entropy
These values are plugging following above equation,
Therefore, the given reaction
(d)
Interpretation:
For the following reaction, the
Concept introduction:
Enthalpy is the amount energy absorbed or released in a process.
The enthalpy change in a system
Where,
(d)

Answer to Problem 20.95P
Given reaction standard enthalpy changes is
Explanation of Solution
Consider the equilibrium reaction is,
Standard enthalpy change is,
The equation for the standard enthalpy of the above reaction is,
Calculate the change in entropy for this reaction as follows
Substituting the values of standard enthalpies of individual species in the above equation
Hence, the standard enthalpy of the reaction
(e)
Interpretation:
For the following reaction, the
Concept introduction:
Free energy (or) entropy change is the term that is used to explain the total energy content in a thermodynamic system that can be converted into work. The free energy is represented by the letter G. All spontaneous process is associated with the decrease of free energy in the system. The equation given below helps us to calculate the change in free energy in a system.
Where,
(e)

Answer to Problem 20.95P
The
Explanation of Solution
Consider the equilibrium reaction is,
Calculate the Free energy change
Standared Free energy change equation is,
Calcualted enthalpy and entropy values are
These values are plugging following standard free energy equation,
Therefore, the
(f)
Interpretation:
For the following reaction, the
Concept introduction:
Free energy (Gibbs free energy) is the term that is used to explain the total energy content in a thermodynamic system that can be converted into work. The free energy is represented by the letter
Where,
(f)

Answer to Problem 20.95P
The standard free energy value is
Explanation of Solution
Given equilibrium reaction is,
Free energy changes
Gibbs free energy equation is,
Free energy change for the reaction is calculated as follows,
Hence, the standard free energy value is
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Chapter 20 Solutions
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