Question 1

Place the following substances in order of increasing vapor pressure at a given temperature. SF6 SiH4 SF4

Accepted Answer

A)  SF6 4  4 
B)  SiH4 4 6 
C)  SF6  4  4 
D)  SF4 6 4 
E)  SiH4 6  4 
A)  SF6 4  4 
B)  SiH4 4 6 
C)  SF6  4  4 
D)  SF4 6 4 
E)  SiH4 6  4 D

Question 2

Determine the vapor pressure (in mm Hg)of a substance at 29°C,whose normal boiling point is 76°C and has a ΔHvap of 38.7 kJ/mol.

Accepted Answer

A)  80 mm Hg 
B)  13 mm Hg 
C)  21 mm Hg 
D)  48 mm Hg 
E)  96 mm Hg 
A)  80 mm Hg 
B)  13 mm Hg 
C)  21 mm Hg 
D)  48 mm Hg 
E)  96 mm Hg E

Question 3

Choose the substance with the highest surface tension.

Accepted Answer

A)  HOCH2CH2OH 
B)  CH2F2 
C)  CH3CH2I 
D)  CH3CH2CH2OH 
E)  CH3CH2CH3   
A)  HOCH2CH2OH 
B)  CH2F2 
C)  CH3CH2I 
D)  CH3CH2CH2OH 
E)  CH3CH2CH3   A

Question 4

Define volatile.

Accepted Answer

Liquids th

Question 5

Choose the substance with the highest viscosity.

Accepted Answer

A)  (CH3CH2)2CO 
B)  C2H4Br2 
C)  HOCH2CH2CH2CH2OH 
D)  CI4 
E)  C8H18 
A)  (CH3CH2)2CO 
B)  C2H4Br2 
C)  HOCH2CH2CH2CH2OH 
D)  CI4 
E)  C8H18

Question 6

Place the following compounds in order of decreasing strength of intermolecular forces. I.CH3CH2CH2CH2CH2CH3 II.(CH3)3CCH3 III.(CH3)3CCH2CH3

Accepted Answer

A)  III > II > I 
B)  I > III > II 
C)  I > II > III 
D)  II > III > I 
E)  III > I > II 
A)  III > II > I 
B)  I > III > II 
C)  I > II > III 
D)  II > III > I 
E)  III > I > II

Question 7

Choose the substance with the lowest boiling point.

Accepted Answer

A)  H2Se 
B)  NBr3 
C)  N2 
D)  CBr2H2 
E)  H2O2 
A)  H2Se 
B)  NBr3 
C)  N2 
D)  CBr2H2 
E)  H2O2

Question 8

Define boiling point of a liquid.

Accepted Answer

The temperature at w

Question 9

How much energy is required to heat 36.0 g H2O from a liquid at 65°C to a gas at 115°C? The following physical data may be useful. ΔHvap = 40.7 kJ/mol
Cliq = 4.18 J/g∘C
Cgas = 2.01 J/g∘C
Csol = 2.09 J/g∘C
Tmelting = 0∘C
Tboiling = 100∘C

Accepted Answer

A)  63.5 kJ 
B)  87.7 kJ 
C)  10.9 kJ 
D)  52.7 kJ 
E)  91.7 kJ 
A)  63.5 kJ 
B)  87.7 kJ 
C)  10.9 kJ 
D)  52.7 kJ 
E)  91.7 kJ

Question 10

Choose the compound that exhibits hydrogen bonding as its strongest intermolecular force.

Accepted Answer

A)  CI4 
B)  C2H6 
C)  CH3OH 
D)  CH2Cl2 
E)  None of the above compounds exhibits hydrogen bonding. 
A)  CI4 
B)  C2H6 
C)  CH3OH 
D)  CH2Cl2 
E)  None of the above compounds exhibits hydrogen bonding.

Question 11

Choose the substance with the highest viscosity.

Accepted Answer

A)  SbBr3 
B)  AsBr5 
C)  IBr2 
D)  BeBr2 
E)  OBr2 
A)  SbBr3 
B)  AsBr5 
C)  IBr2 
D)  BeBr2 
E)  OBr2

Question 12

Identify the compound with the lowest boiling point.

Accepted Answer

A)  CH3OCH3 
B)  CH3CH2CH3 
C)  CH3CHO 
D)  (CH3)2O 
E)  CH3CN 
A)  CH3OCH3 
B)  CH3CH2CH3 
C)  CH3CHO 
D)  (CH3)2O 
E)  CH3CN

Question 13

On a phase diagram,the vaporization curve is between

Accepted Answer

A)  a solid and a gas. 
B)  a solid and a liquid. 
C)  a liquid and a gas. 
D)  two solids. 
E)  two liquids. 
A)  a solid and a gas. 
B)  a solid and a liquid. 
C)  a liquid and a gas. 
D)  two solids. 
E)  two liquids.

Question 14

Why is water an extraordinary substance?

Accepted Answer

A)  Water has a low molar mass, yet it is a liquid at room temperature. 
B)  Water is the main solvent within living organisms. 
C)  Water has an exceptionally high specific heat capacity. 
D)  Water has strong hydrogen bonding. 
E)  All of the above. 
A)  Water has a low molar mass, yet it is a liquid at room temperature. 
B)  Water is the main solvent within living organisms. 
C)  Water has an exceptionally high specific heat capacity. 
D)  Water has strong hydrogen bonding. 
E)  All of the above.

Question 15

On a phase diagram,the sublimation curve is between

Accepted Answer

A)  a solid and a gas. 
B)  a solid and a liquid. 
C)  a liquid and a gas. 
D)  two solids. 
E)  two liquids. 
A)  a solid and a gas. 
B)  a solid and a liquid. 
C)  a liquid and a gas. 
D)  two solids. 
E)  two liquids.

Question 16

Give the term for the temperature at which the gas and liquid phases form a supercritical fluid.

Accepted Answer

A)  absolute temperature 
B)  definite temperature 
C)  fluid temperature 
D)  critical temperature 
E)  solid temperature 
A)  absolute temperature 
B)  definite temperature 
C)  fluid temperature 
D)  critical temperature 
E)  solid temperature

Question 17

Which of the following statements is TRUE?

Accepted Answer

A)  Intermolecular forces are generally stronger than bonding forces. 
B)  The potential energy of molecules decreases as they get closer to one another. 
C)  Energy is given off when the attraction between two molecules is broken. 
D)  Increasing the pressure on a solid usually causes it to become a liquid. 
E)  None of the above is true. 
A)  Intermolecular forces are generally stronger than bonding forces. 
B)  The potential energy of molecules decreases as they get closer to one another. 
C)  Energy is given off when the attraction between two molecules is broken. 
D)  Increasing the pressure on a solid usually causes it to become a liquid. 
E)  None of the above is true.

Question 18

How much heat is released when 115 g of steam at 100.0°C is cooled to ice at -15.0°C? The enthalpy of vaporization of water is 40.67 kJ/mol,the enthalpy of fusion for water is 6.01 kJ/mol,the molar heat capacity of liquid water is 75.4 J/(mol ∙ °C),and the molar heat capacity of ice is 36.4 J/(mol ∙ °C).

Accepted Answer

A)  54.8 kJ 
B)  299 kJ 
C)  350 kJ 
D)  380 kJ 
A)  54.8 kJ 
B)  299 kJ 
C)  350 kJ 
D)  380 kJ

Question 19

Which of the following compounds has the highest boiling point?

Accepted Answer

A)  H2O 
B)  H2S 
C)  H2Se  
D)  As H3 
A)  H2O 
B)  H2S 
C)  H2Se  
D)  As H3

Question 20

List the compounds in order of decreasing boiling point. CH3O CH3 Rn CH3CHO

Accepted Answer

A)  CH3O CH3 > CH3CHO > Rn 
B)  Rn > CH3O CH3 > CH3CHO 
C)  CH3O CH3 > Rn > CH3CHO 
D)  CH3CHO > CH3O CH3 > Rn 
E)  Rn > CH3CHO > CH3O CH3 
A)  CH3O CH3 > CH3CHO > Rn 
B)  Rn > CH3O CH3 > CH3CHO 
C)  CH3O CH3 > Rn > CH3CHO 
D)  CH3CHO > CH3O CH3 > Rn 
E)  Rn > CH3CHO > CH3O CH3

Exam 11: Liquids,solids,and Intermolecular Forces

Place the following substances in order of increasing vapor pressure at a given temperature. SF6 SiH4 SF4

Determine the vapor pressure (in mm Hg)of a substance at 29°C,whose normal boiling point is 76°C and has a ΔHvap of 38.7 kJ/mol.

Choose the substance with the highest surface tension.

Define volatile.

Choose the substance with the highest viscosity.

Place the following compounds in order of decreasing strength of intermolecular forces. I.CH3CH2CH2CH2CH2CH3 II.(CH3)3CCH3 III.(CH3)3CCH2CH3

Choose the substance with the lowest boiling point.

Define boiling point of a liquid.

How much energy is required to heat 36.0 g H2O from a liquid at 65°C to a gas at 115°C? The following physical data may be useful. ΔHvap = 40.7 kJ/mol Cliq = 4.18 J/g∘C Cgas = 2.01 J/g∘C Csol = 2.09 J/g∘C Tmelting = 0∘C Tboiling = 100∘C

Choose the compound that exhibits hydrogen bonding as its strongest intermolecular force.

Choose the substance with the highest viscosity.

Identify the compound with the lowest boiling point.

On a phase diagram,the vaporization curve is between

Why is water an extraordinary substance?

On a phase diagram,the sublimation curve is between

Give the term for the temperature at which the gas and liquid phases form a supercritical fluid.

Which of the following statements is TRUE?

Which of the following compounds has the highest boiling point?

List the compounds in order of decreasing boiling point. CH3O CH3 Rn CH3CHO

Matter, measurement, and Problem Solving

Atoms and Elements

Molecules,compounds,and Chemical Equations

Chemical Quantities and Aqueous Reactions

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes,valence Bond Theory,

Solids and Modern Materials

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

Radioactivity and Nuclear Chemistry

Organic Chemistry

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

Filters

Place the following substances in order of increasing vapor pressure at a given temperature. SF₆ SiH₄ SF₄

Determine the vapor pressure (in mm Hg)of a substance at 29°C,whose normal boiling point is 76°C and has a ΔH_vapof 38.7 kJ/mol.

Place the following compounds in order of decreasing strength of intermolecular forces. I.CH₃CH₂CH₂CH₂CH₂CH₃ II.(CH₃)₃CCH₃ III.(CH₃)₃CCH₂CH₃

How much energy is required to heat 36.0 g H₂O from a liquid at 65°C to a gas at 115°C? The following physical data may be useful. ΔH_vap = 40.7 kJ/mol C_liq = 4.18 J/g^∘C C_gas= 2.01 J/g^∘C C_sol = 2.09 J/g^∘C T_melting= 0^∘C T_boiling = 100^∘C

List the compounds in order of decreasing boiling point. CH₃OCH₃ Rn CH₃CHO