Question 1

Which state of matter has a high density and an indefinite shape?

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 2

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 3

H2 boils at a higher temperature than He because H2 undergoes hydrogen bonding.

Accepted Answer

A) True 
 B)False

Question 4

Gases typically have high densities in comparison to solids.

Accepted Answer

A) True 
 B)False

Question 5

Ion-dipole force is considered the weakest of the different types of intermolecular forces.

Accepted Answer

A) True 
 B)False

Question 6

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) If a liquid forms,continued heating 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) If a liquid forms,continued heating results in increasing the liquid temperature. 
E) all of the above

Question 7

Compounds with very high vapor pressures must have very minimal intermolecular forces.

Accepted Answer

A) True 
 B)False

Question 8

What is the heat of vaporization(kJ/mol)if it takes   of heat to completely vaporize   of the liquid at its boiling point?

Accepted Answer

A) 1288 
B) 1.29 
C) 0.776 
D) 12.2 
E) none of the above 
A) 1288 
B) 1.29 
C) 0.776 
D) 12.2 
E) none of the above

Question 9

How many joules of heat are needed to completely vaporize   of water at its boiling point? Given   = 40.6 kJ/mol

Accepted Answer

A) 54.97 
B)    
C) 29.98 
D)    
E) none of the above 
A) 54.97 
B)    
C) 29.98 
D)    
E) none of the above

Question 10

The boiling point is the temperature at which the vapor pressure of a solution is equal to the intermolecular forces.

Accepted Answer

A) True 
 B)False

Question 11

How many kJ of heat are needed to completely melt 95.3 g of copper metal,given that the metal is at its melting point? The heat of fusion for this metal is 13.1 kJ/mole

Accepted Answer

A) 19.6 
B) 43.0 
C) 1250 
D) 0.114 
E) none of the above 
A) 19.6 
B) 43.0 
C) 1250 
D) 0.114 
E) none of the above

Question 12

How many kJ of heat are needed to completely melt 17.3 g of H2O,given that the water is at its melting point? The heat of fusion for water is 6.02kJ/mole.

Accepted Answer

A) 0.961 
B) 5.79 
C) 1.04 
D) 6.26 
E) none of the above 
A) 0.961 
B) 5.79 
C) 1.04 
D) 6.26 
E) none of the above

Question 13

Atomic solids,such as graphite,have a weak dispersion force holding them together.

Accepted Answer

A) True 
 B)False

Question 14

When you make ice cubes:

Accepted Answer

A) it is an endothermic process. 
B) it is an exothermic process. 
C) the heat of vaporization must be removed. 
D) the process is referred to scientifically as sublimation. 
E) none of the above 
A) it is an endothermic process. 
B) it is an exothermic process. 
C) the heat of vaporization must be removed. 
D) the process is referred to scientifically as sublimation. 
E) none of the above

Question 15

Which intermolecular force increases with increasing molar mass?

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

Which state of matter has a high density and an indefinite shape?

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.

H₂ boils at a higher temperature than He because H₂ undergoes hydrogen bonding.

Gases typically have high densities in comparison to solids.

Ion-dipole force is considered the weakest of the different types of intermolecular forces.

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

Compounds with very high vapor pressures must have very minimal intermolecular forces.

What is the heat of vaporization(kJ/mol)if it takes of heat to completely vaporize of the liquid at its boiling point?

How many joules of heat are needed to completely vaporize of water at its boiling point? Given = 40.6 kJ/mol

The boiling point is the temperature at which the vapor pressure of a solution is equal to the intermolecular forces.

How many kJ of heat are needed to completely melt 95.3 g of copper metal,given that the metal is at its melting point? The heat of fusion for this metal is 13.1 kJ/mole

How many kJ of heat are needed to completely melt 17.3 g of H₂O,given that the water is at its melting point? The heat of fusion for water is 6.02kJ/mole.

Atomic solids,such as graphite,have a weak dispersion force holding them together.

When you make ice cubes:

Which intermolecular force increases with increasing molar mass?

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Exam 12: Liquids, solids, and Intermolecular Forces

Which state of matter has a high density and an indefinite shape?

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.

H2 boils at a higher temperature than He because H2 undergoes hydrogen bonding.

Gases typically have high densities in comparison to solids.

Ion-dipole force is considered the weakest of the different types of intermolecular forces.

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

Compounds with very high vapor pressures must have very minimal intermolecular forces.

What is the heat of vaporization(kJ/mol)if it takes of heat to completely vaporize of the liquid at its boiling point?

How many joules of heat are needed to completely vaporize of water at its boiling point? Given = 40.6 kJ/mol

The boiling point is the temperature at which the vapor pressure of a solution is equal to the intermolecular forces.

How many kJ of heat are needed to completely melt 95.3 g of copper metal,given that the metal is at its melting point? The heat of fusion for this metal is 13.1 kJ/mole

How many kJ of heat are needed to completely melt 17.3 g of H2O,given that the water is at its melting point? The heat of fusion for water is 6.02kJ/mole.

Atomic solids,such as graphite,have a weak dispersion force holding them together.

When you make ice cubes:

Which intermolecular force increases with increasing molar mass?

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

Filters

H₂ boils at a higher temperature than He because H₂ undergoes hydrogen bonding.

How many kJ of heat are needed to completely melt 17.3 g of H₂O,given that the water is at its melting point? The heat of fusion for water is 6.02kJ/mole.