Question 1

Using appropriate, real examples to illustrate your answer, describe the correlation between bond energy and bond length for a series of single bonds.

Accepted Answer

The bonds between carbon, C, and the hal...

Question 2

Which of the following compounds displays the greatest ionic character in its bonds?

Accepted Answer

A)   NO2
B)   CO2
C)   H2O
D)   HF
E)   NH3F) B) and D)
G) B) and E)

Question 3

Acetone can be easily converted to isopropyl alcohol by addition of hydrogen to the carbon-oxygen double bond. Calculate the enthalpy of reaction using the bond energies given.

Accepted Answer

A)   -484 kJ
B)   -366 kJ
C)   -48 kJ
D)   +48 kJ
E)   +366 kJF) B) and E)
G) A) and B)

Question 4

The lattice energy of MgCl2 is the energy change for which one of the following processes?

Accepted Answer

A)   Mg(s)  + Cl2(g)   MgCl2(s) 
B)   Mg(g)  + 2Cl(g)   MgCl2(s) 
C)   Mg2+(s)  + 2Cl-(g)   gCl2(g) 
D)   Mg2+(g)  + 2Cl-(g)   MgCl2(s) 
E)   MgCl2(aq)   MgCl2(s) F) A) and C)
G) B) and D)

Question 5

A single covalent bond consists of a single delocalized electron pair.

Accepted Answer

A) True 
 B)False

Question 6

Electronegativities on Pauling's scale are calculated from ionization energies and electron affinities.

Accepted Answer

A) True 
 B)False

Question 7

The more C-O and O-H bonds there are in a substance, the greater will be the amount of heat released when a fixed mass of the substance is burned.

Accepted Answer

A) True 
 B)False  False

Question 8

Quartz (SiO2)  is a solid with a melting point of 1550 °C. The bonding in quartz is best described as

Accepted Answer

A)   lattice energy.
B)   network attractions.
C)   ionic bonding.
D)   covalent bonding.
E)   metallic bonding.F) A) and E)
G) C) and D)

Question 9

Select the element whose Lewis symbol is correct.

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and C)
G) B) and D)

Question 10

The stronger the bonds in a fuel, the more energy it will yield.

Accepted Answer

A) True 
 B)False

Question 11

When one mole of each of the following liquids is burned, which will produce the most heat energy?

Accepted Answer

A)   C6H14
B)   C5H12
C)   C6H14O
D)   C6H12O
E)   C6H10O3F) B) and E)
G) B) and D)

Question 12

A hypothetical ionic substance will not form merely because it has a high lattice energy. Explain why, using energy-based arguments.

Accepted Answer

In order for an ionic substance to form,...

Question 13

Select the compound with the lowest (i.e., least negative)  lattice energy.

Accepted Answer

A)   CsBr(s) 
B)   NaCl(s) 
C)   SrO(s) 
D)   CaO(s) 
E)   KBr(s) F) All of the above
G) A) and C)

Question 14

A Born-Haber cycle applied to the formation reaction of an ionic solid

Accepted Answer

A)   is normally used to calculate ionization energy.
B)   is normally used to calculate electron affinity.
C)   is normally used to calculate bond energy.
D)   is normally used to determine the overall enthalpy change.
E)   is an application of Hess's Law.F) A) and E)
G) B) and E) E

Question 15

As a measure of the strength of metallic bonding, the boiling point of a metal is a better indicator than its melting point.

Accepted Answer

A) True 
 B)False

Question 16

Give a clear and concise definition of the term "electronegativity"; i.e., what does it measure?

Accepted Answer

Electronegativity measures an ...

Question 17

Which of the following contains covalent bonds?

Accepted Answer

A)   BaO
B)   IBr
C)   Mg
D)   LiBr
E)   CuF) C) and D)
G) B) and E)

Question 18

In not more than three sentences, describe the electron arrangement responsible for bonding in solid SrCl2.

Accepted Answer

This is an example of ionic bonding in which Sr, from group 2A (2) will be present as Sr²⁺ ions, while Cl, from group 7A (7) will be present as Cl^- ions. The cations and anions will be arranged in a crystalline lattice so that nearest neighbors will be ions of opposite charge, thus achieving a net coulombic attraction. There are no molecules present; each ion is equally attracted to all its nearest neighbors.

Question 19

Most of the copper sold in major metal markets is highly purified, typically to 99.99%. Why is this?

Accepted Answer

The main use of copper is as a...

Question 20

Select the correct formula for a compound formed from calcium and chlorine.

Accepted Answer

A)   CaCl
B)   CaCl2
C)   Ca2Cl
D)   Ca2Cl2
E)   CaCl3F) All of the above
G) A) and B)

Exam 9: Models of Chemical Bonding

Using appropriate, real examples to illustrate your answer, describe the correlation between bond energy and bond length for a series of single bonds.

Correct Answer
verified
The bonds between carbon, C, and the hal...
View Answer

Which of the following compounds displays the greatest ionic character in its bonds?

Correct Answer
verified

Acetone can be easily converted to isopropyl alcohol by addition of hydrogen to the carbon-oxygen double bond. Calculate the enthalpy of reaction using the bond energies given.

Correct Answer
verified

The lattice energy of MgCl₂ is the energy change for which one of the following processes?

Correct Answer
verified

A single covalent bond consists of a single delocalized electron pair.

Correct Answer
verified

Electronegativities on Pauling's scale are calculated from ionization energies and electron affinities.

Correct Answer
verified

The more C-O and O-H bonds there are in a substance, the greater will be the amount of heat released when a fixed mass of the substance is burned.

Correct Answer
verified
False

Quartz (SiO₂) is a solid with a melting point of 1550 °C. The bonding in quartz is best described as

Correct Answer
verified

Select the element whose Lewis symbol is correct.

Correct Answer
verified

The stronger the bonds in a fuel, the more energy it will yield.

Correct Answer
verified

When one mole of each of the following liquids is burned, which will produce the most heat energy?

Correct Answer
verified

A hypothetical ionic substance will not form merely because it has a high lattice energy. Explain why, using energy-based arguments.

Correct Answer
verified
In order for an ionic substance to form,...
View Answer

Select the compound with the lowest (i.e., least negative) lattice energy.

Correct Answer
verified

A Born-Haber cycle applied to the formation reaction of an ionic solid

Correct Answer
verified
E

As a measure of the strength of metallic bonding, the boiling point of a metal is a better indicator than its melting point.

Correct Answer
verified

Give a clear and concise definition of the term "electronegativity"; i.e., what does it measure?

Correct Answer
verified
Electronegativity measures an ...
View Answer

Which of the following contains covalent bonds?

Correct Answer
verified

In not more than three sentences, describe the electron arrangement responsible for bonding in solid SrCl₂.

Most of the copper sold in major metal markets is highly purified, typically to 99.99%. Why is this?

Correct Answer
verified
The main use of copper is as a...
View Answer

Select the correct formula for a compound formed from calcium and chlorine.

Correct Answer
verified

Exam 9: Models of Chemical Bonding

Using appropriate, real examples to illustrate your answer, describe the correlation between bond energy and bond length for a series of single bonds.

Correct AnswerverifiedThe bonds between carbon, C, and the hal...View AnswerShow Answer

Which of the following compounds displays the greatest ionic character in its bonds?

Correct AnswerverifiedShow Answer

Acetone can be easily converted to isopropyl alcohol by addition of hydrogen to the carbon-oxygen double bond. Calculate the enthalpy of reaction using the bond energies given.

Correct AnswerverifiedShow Answer

The lattice energy of MgCl2 is the energy change for which one of the following processes?

Correct AnswerverifiedShow Answer

A single covalent bond consists of a single delocalized electron pair.

Correct AnswerverifiedShow Answer

Electronegativities on Pauling's scale are calculated from ionization energies and electron affinities.

Correct AnswerverifiedShow Answer

The more C-O and O-H bonds there are in a substance, the greater will be the amount of heat released when a fixed mass of the substance is burned.

Correct AnswerverifiedFalse

Quartz (SiO2) is a solid with a melting point of 1550 °C. The bonding in quartz is best described as

Correct AnswerverifiedShow Answer

Select the element whose Lewis symbol is correct.

Correct AnswerverifiedShow Answer

The stronger the bonds in a fuel, the more energy it will yield.

Correct AnswerverifiedShow Answer

When one mole of each of the following liquids is burned, which will produce the most heat energy?

Correct AnswerverifiedShow Answer

A hypothetical ionic substance will not form merely because it has a high lattice energy. Explain why, using energy-based arguments.

Correct AnswerverifiedIn order for an ionic substance to form,...View AnswerShow Answer

Select the compound with the lowest (i.e., least negative) lattice energy.

Correct AnswerverifiedShow Answer

A Born-Haber cycle applied to the formation reaction of an ionic solid

Correct AnswerverifiedE

As a measure of the strength of metallic bonding, the boiling point of a metal is a better indicator than its melting point.

Correct AnswerverifiedShow Answer

Give a clear and concise definition of the term "electronegativity"; i.e., what does it measure?

Correct AnswerverifiedElectronegativity measures an ...View AnswerShow Answer

Which of the following contains covalent bonds?

Correct AnswerverifiedShow Answer

In not more than three sentences, describe the electron arrangement responsible for bonding in solid SrCl2.

Most of the copper sold in major metal markets is highly purified, typically to 99.99%. Why is this?

Correct AnswerverifiedThe main use of copper is as a...View AnswerShow Answer

Select the correct formula for a compound formed from calcium and chlorine.

Correct AnswerverifiedShow Answer

Correct Answer
verified
The bonds between carbon, C, and the hal...
View Answer

Correct Answer
verified

Correct Answer
verified

The lattice energy of MgCl₂ is the energy change for which one of the following processes?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
False

Quartz (SiO₂) is a solid with a melting point of 1550 °C. The bonding in quartz is best described as

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
In order for an ionic substance to form,...
View Answer

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified

Correct Answer
verified
Electronegativity measures an ...
View Answer

Correct Answer
verified

In not more than three sentences, describe the electron arrangement responsible for bonding in solid SrCl₂.

Correct Answer
verified
The main use of copper is as a...
View Answer

Correct Answer
verified