(a) Interpretation: The reason as to why one isomer has a lower melting point but higher boiling point is to be stated. Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes surface area is less.

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Answer 1

Question

Chapter 4, Problem 4.46P

Interpretation Introduction

(a)

Interpretation: The reason as to why one isomer has a lower melting point but higher boiling point is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes surface area is less.

Interpretation Introduction

(b)

Interpretation: The reason behind the small difference in the boiling points of the given compounds, but a huge difference in their melting points is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes, surface area is less.

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The melting points and boiling points of two isomeric alkanes are asfollows: CH3(CH2)6CH3, mp = −57 °C and bp = 126 °C; (CH3)3CC(CH3)3,mp = 102 °C and bp = 106 °C. Explain why one isomer has a lower melting point but higher boiling point.

Ethanol and dimethyl ether have the same molecular formula C2H6O. Ethanol is liquid at room temperature while dimethyl ether is gas. Kindly elaborate this occurrence.

Glucose, C6H12O6, contains an aldehyde group but exist predominantly in the form of the cyclic hemiacetal show below. A cyclic hemiacetal is formed when the —OH group of one carbon bonds to the carbonyl group of another carbon. Identify which carbon provides the —OH group and which provides the —CHO? Give a functional isomer of glucose and draw its structure.

Answer 2

Question

Chapter 4, Problem 4.46P

Interpretation Introduction

(a)

Interpretation: The reason as to why one isomer has a lower melting point but higher boiling point is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes surface area is less.

Interpretation Introduction

(b)

Interpretation: The reason behind the small difference in the boiling points of the given compounds, but a huge difference in their melting points is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes, surface area is less.

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Answer 3

Question

Chapter 4, Problem 4.46P

Interpretation Introduction

(a)

Interpretation: The reason as to why one isomer has a lower melting point but higher boiling point is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes surface area is less.

Interpretation Introduction

(b)

Interpretation: The reason behind the small difference in the boiling points of the given compounds, but a huge difference in their melting points is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes, surface area is less.

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Answer 4

Question

Chapter 4, Problem 4.46P

Interpretation Introduction

(a)

Interpretation: The reason as to why one isomer has a lower melting point but higher boiling point is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes surface area is less.

Interpretation Introduction

(b)

Interpretation: The reason behind the small difference in the boiling points of the given compounds, but a huge difference in their melting points is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes, surface area is less.

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Answer 5

Chapter 4, Problem 4.46P

Interpretation Introduction

(a)

Interpretation: The reason as to why one isomer has a lower melting point but higher boiling point is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes surface area is less.

Interpretation Introduction

(b)

Interpretation: The reason behind the small difference in the boiling points of the given compounds, but a huge difference in their melting points is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes, surface area is less.

Answer 6

Chapter 4, Problem 4.46P

Interpretation Introduction

(a)

Interpretation: The reason as to why one isomer has a lower melting point but higher boiling point is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes surface area is less.

Answer 7

Chapter 4, Problem 4.46P

Interpretation Introduction

(a)

Interpretation: The reason as to why one isomer has a lower melting point but higher boiling point is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes surface area is less.

Answer 8

Interpretation Introduction

(b)

Interpretation: The reason behind the small difference in the boiling points of the given compounds, but a huge difference in their melting points is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes, surface area is less.

Answer 9

Interpretation Introduction

(b)

Interpretation: The reason behind the small difference in the boiling points of the given compounds, but a huge difference in their melting points is to be stated.

Concept introduction: Symmetry is one of the important factors for deciding the melting point of a compound. Symmetrical molecule will have high melting point than unsymmetrical molecule. The boiling point of compound is higher, if it contains more polarizable atoms. The boiling point also increases with increase in surface area. Branched chain alkanes have low boiling point than straight chain alkanes because in branched chain alkanes, surface area is less.

Answer 10

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Answer 11

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Answer 12

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Answer 13

Ch. 4 - Prob. 4.1P Ch. 4 - Prob. 4.2P Ch. 4 - (a) Classify the carbon atoms in each compound as...Ch. 4 - Problem 3.3 Classify a carbon atom by the number...Ch. 4 - Problem 4.3 Draw the five constitutional isomers...Ch. 4 - Prob. 4.6P Ch. 4 - Prob. 4.7P Ch. 4 - Draw the five constitutional isomers that have...Ch. 4 - Give the IUPAC name for each compound. a. c. b. ...Ch. 4 - Give the IUPAC name for each compound. a....

Solution Summary: The author explains that symmetry is one of the important factors for deciding the melting point of a compound.

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