(a) Interpretation: The standard heat of formation for N a C l and N a O H and the standard heat of reaction for electrolysis of brine should be determined. Concept introduction: Standard heat of reaction is the change in enthalpy when the reactant is converting into product for one mole compound and is determined at a standard condition of temperature that is 25 o C denoted by using symbol Δ H ^ r ∘ and its calculation is based on the enthalpy of formation of reactant and product. Standard heat of formation is the change in enthalpy when one mole of substance reacts to form product at 25 ∘ C and is denoted by Δ H f .

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Answer 1

Question

Chapter 9, Problem 9.49P

Interpretation Introduction

(a)

Interpretation:

The standard heat of formation for NaCl and NaOH and the standard heat of reaction for electrolysis of brine should be determined.

Concept introduction:

Standard heat of reaction is the change in enthalpy when the reactant is converting into product for one mole compound and is determined at a standard condition of temperature that is 25oC denoted by using symbol ΔH^r∘ and its calculation is based on the enthalpy of formation of reactant and product.

Standard heat of formation is the change in enthalpy when one mole of substance reacts to form product at 25∘C and is denoted by ΔHf.

Interpretation Introduction

(b)

Interpretation:

The energy requirement in MW.hr/year for chlorine formed by the process of electrolysis of brine at a temperature of 25∘C should be determined.

Concept introduction:

Energy requirement calculations are based on the number of moles of chlorine formed and using different unit analysis.

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* :For Electrode Potentials The potential difference between the electrodes of the cell cannot be used as a measure of any electrochemical reaction. the cell potential Ecell is related to the free energy of the reaction AG by AG = - n F Ecell. the standard free energy change AG for the reaction is related to the cell potential by the equation AG = RT In Keq

36. The standard enthalpy (AH) for the reaction of CaCO, with HCI CaCo, + 2 HCI → CaCl, + H,O+ CO, + 90 kJ was determined from the following reactions. Reaction AH at 298 K CaCO, - Cao + CO, 175 kJ 67 kJ Ca(OH)2 H20 + Cao Ca(OH)2 + 2 HCi - Cacla + 2 H;0 Complete the table above by calculating the value of the AH kJ per mole of CaCla produced of the last reaction.

Given that ΔrG⦵ = −212.7 kJ mol−1 for the reaction Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s) in the Daniell cell at 25 °C, and b (CuSO4) = 1.00 × 10−3 mol kg−1 and b (ZnSO4) = 3.00 × 10−3 mol kg−1, calculate (a) the ionic strengths of the solutions, (b) the mean ionic activity coefficients in the compartments, (c) the reaction quotient, (d) the standard cell potential, and (e) the cell potential. (Take γ+ = γ− = γ± in the respective compartments. Use the Debye–Hückel limiting law.)

Answer 2

Question

Chapter 9, Problem 9.49P

Interpretation Introduction

(a)

Interpretation:

The standard heat of formation for NaCl and NaOH and the standard heat of reaction for electrolysis of brine should be determined.

Concept introduction:

Standard heat of reaction is the change in enthalpy when the reactant is converting into product for one mole compound and is determined at a standard condition of temperature that is 25oC denoted by using symbol ΔH^r∘ and its calculation is based on the enthalpy of formation of reactant and product.

Standard heat of formation is the change in enthalpy when one mole of substance reacts to form product at 25∘C and is denoted by ΔHf.

Interpretation Introduction

(b)

Interpretation:

The energy requirement in MW.hr/year for chlorine formed by the process of electrolysis of brine at a temperature of 25∘C should be determined.

Concept introduction:

Energy requirement calculations are based on the number of moles of chlorine formed and using different unit analysis.

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Answer 3

Question

Chapter 9, Problem 9.49P

Interpretation Introduction

(a)

Interpretation:

The standard heat of formation for NaCl and NaOH and the standard heat of reaction for electrolysis of brine should be determined.

Concept introduction:

Standard heat of reaction is the change in enthalpy when the reactant is converting into product for one mole compound and is determined at a standard condition of temperature that is 25oC denoted by using symbol ΔH^r∘ and its calculation is based on the enthalpy of formation of reactant and product.

Standard heat of formation is the change in enthalpy when one mole of substance reacts to form product at 25∘C and is denoted by ΔHf.

Interpretation Introduction

(b)

Interpretation:

The energy requirement in MW.hr/year for chlorine formed by the process of electrolysis of brine at a temperature of 25∘C should be determined.

Concept introduction:

Energy requirement calculations are based on the number of moles of chlorine formed and using different unit analysis.

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Answer 4

Question

Chapter 9, Problem 9.49P

Interpretation Introduction

(a)

Interpretation:

The standard heat of formation for NaCl and NaOH and the standard heat of reaction for electrolysis of brine should be determined.

Concept introduction:

Standard heat of reaction is the change in enthalpy when the reactant is converting into product for one mole compound and is determined at a standard condition of temperature that is 25oC denoted by using symbol ΔH^r∘ and its calculation is based on the enthalpy of formation of reactant and product.

Standard heat of formation is the change in enthalpy when one mole of substance reacts to form product at 25∘C and is denoted by ΔHf.

Interpretation Introduction

(b)

Interpretation:

The energy requirement in MW.hr/year for chlorine formed by the process of electrolysis of brine at a temperature of 25∘C should be determined.

Concept introduction:

Energy requirement calculations are based on the number of moles of chlorine formed and using different unit analysis.

Expert Solution & Answer

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Answer 5

Chapter 9, Problem 9.49P

Interpretation Introduction

(a)

Interpretation:

The standard heat of formation for NaCl and NaOH and the standard heat of reaction for electrolysis of brine should be determined.

Concept introduction:

Standard heat of reaction is the change in enthalpy when the reactant is converting into product for one mole compound and is determined at a standard condition of temperature that is 25oC denoted by using symbol ΔH^r∘ and its calculation is based on the enthalpy of formation of reactant and product.

Standard heat of formation is the change in enthalpy when one mole of substance reacts to form product at 25∘C and is denoted by ΔHf.

Interpretation Introduction

(b)

Interpretation:

The energy requirement in MW.hr/year for chlorine formed by the process of electrolysis of brine at a temperature of 25∘C should be determined.

Concept introduction:

Energy requirement calculations are based on the number of moles of chlorine formed and using different unit analysis.

Answer 6

Chapter 9, Problem 9.49P

Interpretation Introduction

(a)

Interpretation:

The standard heat of formation for NaCl and NaOH and the standard heat of reaction for electrolysis of brine should be determined.

Concept introduction:

Standard heat of reaction is the change in enthalpy when the reactant is converting into product for one mole compound and is determined at a standard condition of temperature that is 25oC denoted by using symbol ΔH^r∘ and its calculation is based on the enthalpy of formation of reactant and product.

Standard heat of formation is the change in enthalpy when one mole of substance reacts to form product at 25∘C and is denoted by ΔHf.

Answer 7

Chapter 9, Problem 9.49P

Interpretation Introduction

(a)

Interpretation:

The standard heat of formation for NaCl and NaOH and the standard heat of reaction for electrolysis of brine should be determined.

Concept introduction:

Standard heat of reaction is the change in enthalpy when the reactant is converting into product for one mole compound and is determined at a standard condition of temperature that is 25oC denoted by using symbol ΔH^r∘ and its calculation is based on the enthalpy of formation of reactant and product.

Standard heat of formation is the change in enthalpy when one mole of substance reacts to form product at 25∘C and is denoted by ΔHf.

Answer 8

Interpretation Introduction

(b)

Interpretation:

The energy requirement in MW.hr/year for chlorine formed by the process of electrolysis of brine at a temperature of 25∘C should be determined.

Concept introduction:

Energy requirement calculations are based on the number of moles of chlorine formed and using different unit analysis.

Answer 9

Interpretation Introduction

(b)

Interpretation:

The energy requirement in MW.hr/year for chlorine formed by the process of electrolysis of brine at a temperature of 25∘C should be determined.

Concept introduction:

Energy requirement calculations are based on the number of moles of chlorine formed and using different unit analysis.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 9 - The standard heat of the reaction...Ch. 9 - Prob. 9.2P Ch. 9 - Prob. 9.3P Ch. 9 - The standard heat of the reaction...Ch. 9 - Prob. 9.5P Ch. 9 - Prob. 9.6P Ch. 9 - Prob. 9.7P Ch. 9 - Prob. 9.8P Ch. 9 - The standard heat of combustion of gaseous ethane...Ch. 9 - The standard heat of combustion (AH°) of liquid...

Solution Summary: The author explains the standard heat of formation for NaCl and NaOH, based on the enthalpy of reaction for reactant and product.

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