Question 1

Which intermolecular force is the strongest?

Accepted Answer

A) dispersion forces 
B) dipole-dipole forces 
C) hydrogen bonding 
D) X-forces 
E) none of the above 
A) dispersion forces 
B) dipole-dipole forces 
C) hydrogen bonding 
D) X-forces 
E) none of the above

Question 2

NaCl is which type of solid?

Accepted Answer

A) molecular solid 
B) ionic solid 
C) covalent atomic solid 
D) nonbonding atomic solid 
E) metallic atomic solid 
A) molecular solid 
B) ionic solid 
C) covalent atomic solid 
D) nonbonding atomic solid 
E) metallic atomic solid

Question 3

Assuming that the molecules carbon monoxide (CO)and nitrogen (N2)have similar electron clouds,which statement below is TRUE?

Accepted Answer

A) CO has the higher boiling point because it experiences dipole-dipole forces. 
B) N2 has the higher boiling point because it experiences dipole-dipole forces. 
C) The N2 has the higher boiling point because it has greater dispersion forces. 
D) Both CO and N2 must have the same boiling point. 
E) none of the above 
A) CO has the higher boiling point because it experiences dipole-dipole forces. 
B) N2 has the higher boiling point because it experiences dipole-dipole forces. 
C) The N2 has the higher boiling point because it has greater dispersion forces. 
D) Both CO and N2 must have the same boiling point. 
E) none of the above

Question 4

Which molecule below has hydrogen bonding?

Accepted Answer

A) NH3 
B) CH3OH 
C) H2O 
D) HF 
E) all of the above 
A) NH3 
B) CH3OH 
C) H2O 
D) HF 
E) all of the above

Question 5

Compounds that are similar to water in molecular mass all exist as solids.

Accepted Answer

A) True 
 B)False

Question 6

Silicon is which type of solid?

Accepted Answer

A) molecular solid 
B) ionic solid 
C) covalent atomic solid 
D) nonbonding atomic solid 
E) metallic atomic solid 
A) molecular solid 
B) ionic solid 
C) covalent atomic solid 
D) nonbonding atomic solid 
E) metallic atomic solid

Question 7

Gases typically have high densities in comparison to solids.

Accepted Answer

A) True 
 B)False

Question 8

The strength of the surface tension is inversely related to the strength of the intermolecular forces.

Accepted Answer

A) True 
 B)False

Question 9

How many kJ of heat are needed to completely vaporize 23.4 g of H2O? The heat of vaporization for water at the boiling point is 40.6 kJ/mole.

Accepted Answer

A) 31.2 
B) 52.8 
C) 23.4 
D) 2.26 
E) none of the above 
A) 31.2 
B) 52.8 
C) 23.4 
D) 2.26 
E) none of the above

Question 10

The rate of evaporation will increase if you pour a liquid out onto a large surface.

Accepted Answer

A) True 
 B)False

Question 11

How many kJ of heat are needed to completely melt 1.70 moles of H2O,given that the water is at its melting point? The heat of fusion for water is 6.02 kJ/mole.

Accepted Answer

A) 30.6 
B) 10.2 
C) 3.54 
D) 63.7 
E) none of the above 
A) 30.6 
B) 10.2 
C) 3.54 
D) 63.7 
E) none of the above

Question 12

Water has a heat of vaporization of 44.0 kJ/mol while the chemical diethyl ether has a heat of vaporization of 27.1 kJ/mol.This shows that one mole of water would vaporize more easily than would one mole of diethyl ether.

Accepted Answer

A) True 
 B)False

Question 13

Increasing the intermolecular forces of a liquid will do which of the following?

Accepted Answer

A) increase the viscosity 
B) decrease the evaporation rate 
C) increase the surface tension 
D) decrease the vapor pressure 
E) all of the above 
A) increase the viscosity 
B) decrease the evaporation rate 
C) increase the surface tension 
D) decrease the vapor pressure 
E) all of the above

Question 14

Evaporation is decreased by increasing the intermolecular forces.

Accepted Answer

A) True 
 B)False

Question 15

Water has unusual physical properties which enable life to exist on earth.

Accepted Answer

A) True 
 B)False

Question 16

Why is water considered an unusual molecule?

Accepted Answer

A) No molecule of similar size is a liquid at room temperature. 
B) No molecule of similar size has as high a boiling point. 
C) Water can dissolve many polar and ionic compounds. 
D) Water expands upon freezing. 
E) all of the above 
A) No molecule of similar size is a liquid at room temperature. 
B) No molecule of similar size has as high a boiling point. 
C) Water can dissolve many polar and ionic compounds. 
D) Water expands upon freezing. 
E) all of the above

Question 17

The opposite process of freezing is:

Accepted Answer

A) evaporation. 
B) sublimation. 
C) boiling. 
D) condensation. 
E) none of the above 
A) evaporation. 
B) sublimation. 
C) boiling. 
D) condensation. 
E) none of the above

Question 18

Which substance is most likely to be miscible with water?

Accepted Answer

A) CF4 
B) Br2 
C) CS2 
D) CHCl3 
E) none of the above 
A) CF4 
B) Br2 
C) CS2 
D) CHCl3 
E) none of the above

Question 19

Which state of matter has a low density and an indefinite volume?

Accepted Answer

A) solids 
B) liquids 
C) gases 
D) both solids and liquids 
E) none of the above 
A) solids 
B) liquids 
C) gases 
D) both solids and liquids 
E) none of the above

Question 20

What happens as you start to add heat to a solid substance?

Accepted Answer

A) Thermal energy causes the components of the solid to vibrate faster. 
B) When the melting point is reached,the thermal energy is sufficient to overcome intermolecular forces holding the components at their stationary points. 
C) Increasing the rate of heating of a substance at its melting point only causes more rapid melting. 
D) Heating of the now formed liquid results in increasing the liquid temperature. 
E) all of the above 
A) Thermal energy causes the components of the solid to vibrate faster. 
B) When the melting point is reached,the thermal energy is sufficient to overcome intermolecular forces holding the components at their stationary points. 
C) Increasing the rate of heating of a substance at its melting point only causes more rapid melting. 
D) Heating of the now formed liquid results in increasing the liquid temperature. 
E) all of the above

Which intermolecular force is the strongest?

NaCl is which type of solid?

Assuming that the molecules carbon monoxide (CO)and nitrogen (N₂)have similar electron clouds,which statement below is TRUE?

Which molecule below has hydrogen bonding?

Compounds that are similar to water in molecular mass all exist as solids.

Silicon is which type of solid?

Gases typically have high densities in comparison to solids.

The strength of the surface tension is inversely related to the strength of the intermolecular forces.

How many kJ of heat are needed to completely vaporize 23.4 g of H₂O? The heat of vaporization for water at the boiling point is 40.6 kJ/mole.

The rate of evaporation will increase if you pour a liquid out onto a large surface.

How many kJ of heat are needed to completely melt 1.70 moles of H₂O,given that the water is at its melting point? The heat of fusion for water is 6.02 kJ/mole.

Water has a heat of vaporization of 44.0 kJ/mol while the chemical diethyl ether has a heat of vaporization of 27.1 kJ/mol.This shows that one mole of water would vaporize more easily than would one mole of diethyl ether.

Increasing the intermolecular forces of a liquid will do which of the following?

Evaporation is decreased by increasing the intermolecular forces.

Water has unusual physical properties which enable life to exist on earth.

Why is water considered an unusual molecule?

The opposite process of freezing is:

Which substance is most likely to be miscible with water?

Which state of matter has a low density and an indefinite volume?

What happens as you start to add heat to a solid substance?

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Exam 12: Liquids,solids,and Intermolecular Forces

Which intermolecular force is the strongest?

NaCl is which type of solid?

Assuming that the molecules carbon monoxide (CO)and nitrogen (N2)have similar electron clouds,which statement below is TRUE?

Which molecule below has hydrogen bonding?

Compounds that are similar to water in molecular mass all exist as solids.

Silicon is which type of solid?

Gases typically have high densities in comparison to solids.

The strength of the surface tension is inversely related to the strength of the intermolecular forces.

How many kJ of heat are needed to completely vaporize 23.4 g of H2O? The heat of vaporization for water at the boiling point is 40.6 kJ/mole.

The rate of evaporation will increase if you pour a liquid out onto a large surface.

How many kJ of heat are needed to completely melt 1.70 moles of H2O,given that the water is at its melting point? The heat of fusion for water is 6.02 kJ/mole.

Water has a heat of vaporization of 44.0 kJ/mol while the chemical diethyl ether has a heat of vaporization of 27.1 kJ/mol.This shows that one mole of water would vaporize more easily than would one mole of diethyl ether.

Increasing the intermolecular forces of a liquid will do which of the following?

Evaporation is decreased by increasing the intermolecular forces.

Water has unusual physical properties which enable life to exist on earth.

Why is water considered an unusual molecule?

The opposite process of freezing is:

Which substance is most likely to be miscible with water?

Which state of matter has a low density and an indefinite volume?

What happens as you start to add heat to a solid substance?

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

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Assuming that the molecules carbon monoxide (CO)and nitrogen (N₂)have similar electron clouds,which statement below is TRUE?

How many kJ of heat are needed to completely vaporize 23.4 g of H₂O? The heat of vaporization for water at the boiling point is 40.6 kJ/mole.

How many kJ of heat are needed to completely melt 1.70 moles of H₂O,given that the water is at its melting point? The heat of fusion for water is 6.02 kJ/mole.