A second chain propagation step in the given reaction has to be proposed. Concept introduction: Halogenation of alkanes : The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction. Radical chain reaction: Initiation reaction: Chain propagation: Chain termination:

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Answer 1

Question

Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.

Chapter 8, Problem 8.21P

(a)

Interpretation Introduction

Interpretation:

A second chain propagation step in the given reaction has to be proposed.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

(b)

Interpretation Introduction

Interpretation:

Heat of the reaction, ΔH0 for each propagation step has to be calculated.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Bond dissociation energy is a measure of bond strength in a chemical bond.

It is a change in enthalpy of a homolysis reaction at absolute zero where a molecule is broken down into two free radicals.

ΔH0= ∑BDE(broken) − ∑ BDE(formed)

(c)

Interpretation Introduction

Interpretation:

The energies and relative rates of the set chain propagation steps in section 8.5B with given reaction has to be compared.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

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In the video, we looked at the absorbance of a certain substance and how it varies depending on what wavelength of light we are looking at. Below is a similar scan of a different substance. What color BEST describes how this substance will appear? Absorbance (AU) Violet Blue Green Orange 1.2 1.0- 0.8- 0.6- 0.4- 0.2 0.0 450 500 550 600 650 700 Wavelength (nm) violet indigo blue green yellow orange red Red O Cannot tell from this information In the above graph, what causes -450 nm wavelength of light to have a higher absorbance than light with a -550 nm wavelength? Check all that are true. The distance the light travels is different The different data points are for different substances The concentration is different at different times in the experiment Epsilon (molar absortivity) is different at different wavelengths

5. a. Data were collected for Trial 1 to determine the molar mass of a nonvolatile solid solute when dissolved in cyclo- hexane. Complete the table for the analysis (See Report Sheet). Record calculated values with the correct number of significant figures. B. Freezing Point of Cyclohexane plus Calculation Zone Unknown Solute 2. Mass of cyclohexane (g) 10.14 Part C.4 3. Mass of added solute (g) 0.255 C. Calculations 1. k; for cyclohexane (°C⚫ kg/mol) 20.0 2. Freezing point change, AT, (°C) 3.04 Part C.6 3. Mass of cyclohexane in solution (kg) 4. Moles of solute, total (mol) Show calculation. 5. Mass of solute in solution, total (g) 6. Molar mass of solute (g/mol) Show calculation.

Answer 2

Question

Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.

Chapter 8, Problem 8.21P

(a)

Interpretation Introduction

Interpretation:

A second chain propagation step in the given reaction has to be proposed.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

(b)

Interpretation Introduction

Interpretation:

Heat of the reaction, ΔH0 for each propagation step has to be calculated.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Bond dissociation energy is a measure of bond strength in a chemical bond.

It is a change in enthalpy of a homolysis reaction at absolute zero where a molecule is broken down into two free radicals.

ΔH0= ∑BDE(broken) − ∑ BDE(formed)

(c)

Interpretation Introduction

Interpretation:

The energies and relative rates of the set chain propagation steps in section 8.5B with given reaction has to be compared.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

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Answer 3

Question

Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.

Chapter 8, Problem 8.21P

(a)

Interpretation Introduction

Interpretation:

A second chain propagation step in the given reaction has to be proposed.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

(b)

Interpretation Introduction

Interpretation:

Heat of the reaction, ΔH0 for each propagation step has to be calculated.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Bond dissociation energy is a measure of bond strength in a chemical bond.

It is a change in enthalpy of a homolysis reaction at absolute zero where a molecule is broken down into two free radicals.

ΔH0= ∑BDE(broken) − ∑ BDE(formed)

(c)

Interpretation Introduction

Interpretation:

The energies and relative rates of the set chain propagation steps in section 8.5B with given reaction has to be compared.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Formula Formula Bond dissociation energy (BDE) is the energy required to break a bond, making it an endothermic process. BDE is calculated for a particular bond and therefore consists of fragments such as radicals since it undergoes homolytic bond cleavage. For the homolysis of a X-Y molecule, the energy of bond dissociation is calculated as the difference in the total enthalpy of formation for the reactants and products. X-Y → X + Y BDE = Δ H f X + Δ H f Y – Δ H f X-Y where, ΔHf is the heat of formation.

Chapter 8, Problem 8.21P

(a)

Interpretation Introduction

Interpretation:

A second chain propagation step in the given reaction has to be proposed.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

(b)

Interpretation Introduction

Interpretation:

Heat of the reaction, ΔH0 for each propagation step has to be calculated.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Bond dissociation energy is a measure of bond strength in a chemical bond.

It is a change in enthalpy of a homolysis reaction at absolute zero where a molecule is broken down into two free radicals.

ΔH0= ∑BDE(broken) − ∑ BDE(formed)

(c)

Interpretation Introduction

Interpretation:

The energies and relative rates of the set chain propagation steps in section 8.5B with given reaction has to be compared.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

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Check out a sample textbook solution

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Answer 5

Chapter 8, Problem 8.21P

(a)

Interpretation Introduction

Interpretation:

A second chain propagation step in the given reaction has to be proposed.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

(b)

Interpretation Introduction

Interpretation:

Heat of the reaction, ΔH0 for each propagation step has to be calculated.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Bond dissociation energy is a measure of bond strength in a chemical bond.

It is a change in enthalpy of a homolysis reaction at absolute zero where a molecule is broken down into two free radicals.

ΔH0= ∑BDE(broken) − ∑ BDE(formed)

(c)

Interpretation Introduction

Interpretation:

The energies and relative rates of the set chain propagation steps in section 8.5B with given reaction has to be compared.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Answer 6

Chapter 8, Problem 8.21P

(a)

Interpretation Introduction

Interpretation:

A second chain propagation step in the given reaction has to be proposed.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Answer 7

Chapter 8, Problem 8.21P

(a)

Interpretation Introduction

Interpretation:

A second chain propagation step in the given reaction has to be proposed.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Answer 8

(b)

Interpretation Introduction

Interpretation:

Heat of the reaction, ΔH0 for each propagation step has to be calculated.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Bond dissociation energy is a measure of bond strength in a chemical bond.

It is a change in enthalpy of a homolysis reaction at absolute zero where a molecule is broken down into two free radicals.

ΔH0= ∑BDE(broken) − ∑ BDE(formed)

Answer 9

(b)

Interpretation Introduction

Interpretation:

Heat of the reaction, ΔH0 for each propagation step has to be calculated.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Bond dissociation energy is a measure of bond strength in a chemical bond.

It is a change in enthalpy of a homolysis reaction at absolute zero where a molecule is broken down into two free radicals.

ΔH0= ∑BDE(broken) − ∑ BDE(formed)

Answer 10

(c)

Interpretation Introduction

Interpretation:

The energies and relative rates of the set chain propagation steps in section 8.5B with given reaction has to be compared.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Answer 11

(c)

Interpretation Introduction

Interpretation:

The energies and relative rates of the set chain propagation steps in section 8.5B with given reaction has to be compared.

Concept introduction:

Halogenation of alkanes: The replacement of one or more hydrogen atoms by halogen. When alkanes is heated or irradiated with the light of specific wavelength, the alkyl halide are formed by radical chain reaction.

Radical chain reaction:

Initiation reaction:

Chain propagation:

Chain termination:

Answer 12

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Answer 13

Expert Solution & Answer

Answer 14

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Answer 15

Ch. 8.2 - Prob. 8.1P Ch. 8.4 - Name and draw structural formulas for all...Ch. 8.4 - Using the table of bond dissociation enthalpies in...Ch. 8.5 - Prob. 8.4P Ch. 8.6 - Given the solution to Example 8.5, predict the...Ch. 8.7 - Prob. 8.6P Ch. 8.7 - Linoleic acid is shown below. What makes this...Ch. 8.7 - Prob. BQ Ch. 8.7 - Prob. CQ Ch. 8.7 - The strength of the HO bond in vitamin E is weaker...

Solution Summary: The author introduces the concept of halogenation of alkanes, which involves the formation of radicals from non-radical species.

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