Calculate ΔG° at 355 K for each of the reactions in Question 17. State whether the reactions are spontaneous.
(a)
Interpretation:
Concept introduction:
The mathematical expression for the standard entropy value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
The mathematical expression for the standard enthalpy change value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
At standard states, the free energy charge which is responsible for the production of 1 mole of a molecule from its elements is known as standard free energy of formation and it is represented by
The mathematical expression for
If both
Answer to Problem 25QAP
.
Explanation of Solution
The given value is:
Temperature = 355 K
The value of standard enthalpy for
The value of standard enthalpy for
The value of standard enthalpy for
Put the values, we get:
The mathematical expression for
Put the values,
Since, 1 Kilojoule = 1000 Joule
The negative value of change in free energy denotes that the process is spontaneous.
(b)
Interpretation:
Concept introduction:
The mathematical expression for the standard entropy value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
The mathematical expression for the standard enthalpy change value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
At standard states, the free energy charge which is responsible for the production of 1 mole of a molecule from its elements is known as standard free energy of formation and it is represented by
The mathematical expression for
If both
Answer to Problem 25QAP
.
Explanation of Solution
The given value is:
Temperature = 355 K
The value of standard enthalpy for
The value of standard enthalpy for
The value of standard enthalpy for
Put the values, we get:
The mathematical expression for
Put the values,
Since, 1 Kilojoule = 1000 Joule
The positive value of change in free energy denotes that the process is non-spontaneous.
(c)
Interpretation:
Concept introduction:
The mathematical expression for the standard entropy value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
The mathematical expression for the standard enthalpy change value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
At standard states, the free energy charge which is responsible for the production of 1 mole of a molecule from its elements is known as standard free energy of formation and it is represented by
The mathematical expression for
If both
Answer to Problem 25QAP
.
Explanation of Solution
The given value is:
Temperature = 355 K
The value of standard enthalpy for
The value of standard enthalpy for
The value of standard enthalpy for
Put the values, we get:
The mathematical expression for
Put the values,
Since, 1 Kilojoule = 1000 Joule
The negative value of change in free energy denotes that the process is Spontaneous.
(d)
Interpretation:
Concept introduction:
The mathematical expression for the standard entropy value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
The mathematical expression for the standard enthalpy change value at room temperature is:
Where, n and p represents the coefficients of reactants and products in the balanced chemical equation.
At standard states, the free energy charge which is responsible for the production of 1 mole of a molecule from its elements is known as standard free energy of formation and it is represented by
The mathematical expression for
If both
Answer to Problem 25QAP
.
Explanation of Solution
The given value is:
Temperature = 355 K
The value of standard enthalpy for
The value of standard enthalpy for
The value of standard enthalpy for
The value of standard enthalpy for
Put the values, we get:
The mathematical expression for
Put the values,
Since, 1 Kilojoule = 1000 Joule
The negative value of change in free energy denotes that the process is Spontaneous.
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Chapter 16 Solutions
Study Guide And Workbook For Masterton/hurley's Chemistry: Principles And Reactions, 8th
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- Consider the equilibrium system HF(aq)H+(aq)+F(aq) Given HfHF(aq)=320.1kJ/mol , HfF(aq)=332.6kJ/mol ; SF(aq)=13.8kJ/molK ; KaHF=6.9104 at 25°C calculate S° for HF(aq).arrow_forwardGiven the following standard free energies at 25°C for the following reactions: N2O5(g)2NO(g)+32O2(g)G=59.2kJNO(g)+12O2(g)NO2(g)G=35.6kJ Calculate G° at 25°C for the following reaction: 2NO2(g)+12O2(g)N2O5(g)arrow_forwardCalculate the standard cell potential of the following cell at 25C. Sn(s)Sn2+(aq)I2(aq)I(aq)arrow_forward
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