Question 1

Which would have the stronger intermolecular forces of attraction H2S or H2Se?

Accepted Answer

Question 2

Which one of the following substances is expected to have the highest boiling point?

Accepted Answer

A) HBr 
B) HCl 
C) HF 
D) HI 
A) HBr 
B) HCl 
C) HF 
D) HI

Question 3

Which one of the following substances should exhibit hydrogen bonding in the liquid state?

Accepted Answer

A) PH3 
B) He 
C) H2S 
D) CH4 
E) CH3OH 
A) PH3 
B) He 
C) H2S 
D) CH4 
E) CH3OH

Question 4

HOCH2CH2OH(s)is classified as which of the following?

Accepted Answer

A) metallic crystal. 
B) covalent solid. 
C) molecular crystal. 
D) amorphous solid. 
E) ionic crystal. 
A) metallic crystal. 
B) covalent solid. 
C) molecular crystal. 
D) amorphous solid. 
E) ionic crystal.

Question 5

Which would be expected to have the higher boiling point NH3 or PH3?

Accepted Answer

Question 6

Potassium bromide, KBr, crystallizes like NaCl in a face-centered lattice.The ionic radii of K+ and Br- ions are 133 pm and 195 pm, respectively.Assuming that all Br- ions are positioned in the face and corners of the unit cell, while the K+ ions are positioned along the edge alternating between anions, calculate the length of a unit cell edge.

Accepted Answer

A) 230 pm 
B) 328 pm 
C) 523 pm 
D) 656 pm 
E) 780 pm 
A) 230 pm 
B) 328 pm 
C) 523 pm 
D) 656 pm 
E) 780 pm

Question 7

Of the given pair of substances at room temperature, which is more viscous?
Honey or Mustard

Accepted Answer

The answer of Of the given pair of substances at...

Question 8

Which one of the following substances will have both dispersion forces and dipole-dipole forces?

Accepted Answer

A) HCl 
B) BCl3 
C) Br2 
D) H2 
E) CO2 
A) HCl 
B) BCl3 
C) Br2 
D) H2 
E) CO2

Question 9

Each of the following substances is a liquid at -50°C.Place these liquids in order of increasing vapor pressure: dimethyl ether (CH3OCH3), propane (C3H8), and ethanol (CH3CH2OH).

Accepted Answer

A) ethanol < propane < dimethyl ether 
B) ethanol < dimethyl ether < propane 
C) propane < dimethyl ether < ethanol 
D) dimethyl ether < ethanol < propane 
E) propane < ethanol < dimethyl ether 
A) ethanol < propane < dimethyl ether 
B) ethanol < dimethyl ether < propane 
C) propane < dimethyl ether < ethanol 
D) dimethyl ether < ethanol < propane 
E) propane < ethanol < dimethyl ether

Question 10

Based on the phase diagram shown below, which is more dense: the liquid phase or the solid phase?

Accepted Answer

the solid

Question 11

Suppose the atoms in a two-dimensional crystal have the following arrangement:   What is the coordination number of each atom in this crystal?

Accepted Answer

The answer of Suppose the atoms in a two-dimensional crystal...

Question 12

Boron nitride, BN3, melts at approximately at 3,000°C under high pressure.This material is almost as hard as diamond.What kind of crystal is this?

Accepted Answer

Question 13

Indicate all the types of intermolecular forces of attraction in C2H6(g).

Accepted Answer

Question 14

What phase exists at the point labeled c?

Accepted Answer

The answer of What phase exists at the point labeled...

Question 15

Which one of the following substances is expected to have the highest melting point?

Accepted Answer

A) CH4 
B) CCl4 
C) CO 
D) CO2 
E) C(diamond) 
A) CH4 
B) CCl4 
C) CO 
D) CO2 
E) C(diamond)

Question 16

Which of the following constants is/are needed to calculate the amount of energy required to heat 30.5g of H2O(s)at -25.0°C to H2O(l)at 55.0°C? $\Delta$Hfus (H2O)
II.$\Delta$Hvap  (H2O)
III.specific heat of H2O(s)
IV.specific heat of H2O(l)
V.specific heat of H2O(g)

Accepted Answer

A) I, II, III, IV, and IV 
B) III and IV 
C) I, II, III, and IV 
D) I, III, and IV 
E) I only 
A) I, II, III, IV, and IV 
B) III and IV 
C) I, II, III, and IV 
D) I, III, and IV 
E) I only

Question 17

How much energy (heat)is required to convert 25.5 g of H2O(l)at 35.0°C to H2O(g)at 115.0°C?

Accepted Answer

A) 207 J 
B) 7,630 J 
C) 8,530 J 
D) 9,130 J 
E) 65,200 J 
A) 207 J 
B) 7,630 J 
C) 8,530 J 
D) 9,130 J 
E) 65,200 J

Question 18

Indicate all the types of intermolecular forces of attraction in SF4(g).

Accepted Answer

dipole-dip

Question 19

The boiling points of propanol (CH3CH2CH2OH)and pentanol (CH3CH2CH2CH2CH2OH)are 97°C and 137°C, respectively.The boiling point of butanol (CH3CH2CH2CH2OH)is predicted to be:

Accepted Answer

A) 137°C C) > 97°C and < 137°C D) 97°C E) 137°C A) 137°C C) > 97°C and < 137°C D) 97°C E) 137°C

Question 20

The intermolecular forces present in C6H6 include which of the following? I.dipole-dipole
II.ion-dipole
III.dispersion
IV.hydrogen bonding

Accepted Answer

A) I, II, III, and IV 
B) I and III 
C) I, III, and IV 
D) I and II 
E) III only 
A) I, II, III, and IV 
B) I and III 
C) I, III, and IV 
D) I and II 
E) III only

Exam 11: Intermolecular Forces and Liquids and Solids

Which would have the stronger intermolecular forces of attraction H2S or H2Se?

Which one of the following substances is expected to have the highest boiling point?

Which one of the following substances should exhibit hydrogen bonding in the liquid state?

HOCH2CH2OH(s)is classified as which of the following?

Which would be expected to have the higher boiling point NH3 or PH3?

Of the given pair of substances at room temperature, which is more viscous? Honey or Mustard

Which one of the following substances will have both dispersion forces and dipole-dipole forces?

Each of the following substances is a liquid at -50°C.Place these liquids in order of increasing vapor pressure: dimethyl ether (CH3OCH3), propane (C3H8), and ethanol (CH3CH2OH).

Based on the phase diagram shown below, which is more dense: the liquid phase or the solid phase?

Suppose the atoms in a two-dimensional crystal have the following arrangement: What is the coordination number of each atom in this crystal?

Boron nitride, BN3, melts at approximately at 3,000°C under high pressure.This material is almost as hard as diamond.What kind of crystal is this?

Indicate all the types of intermolecular forces of attraction in C2H6(g).

What phase exists at the point labeled c?

Which one of the following substances is expected to have the highest melting point?

Which of the following constants is/are needed to calculate the amount of energy required to heat 30.5g of H2O(s)at -25.0°C to H2O(l)at 55.0°C? Δ\DeltaΔ Hfus (H2O) II. Δ\DeltaΔ Hvap (H2O) III.specific heat of H2O(s) IV.specific heat of H2O(l) V.specific heat of H2O(g)

How much energy (heat)is required to convert 25.5 g of H2O(l)at 35.0°C to H2O(g)at 115.0°C?

Indicate all the types of intermolecular forces of attraction in SF4(g).

The boiling points of propanol (CH3CH2CH2OH)and pentanol (CH3CH2CH2CH2CH2OH)are 97°C and 137°C, respectively.The boiling point of butanol (CH3CH2CH2CH2OH)is predicted to be:

The intermolecular forces present in C6H6 include which of the following? I.dipole-dipole II.ion-dipole III.dispersion IV.hydrogen bonding

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Which would have the stronger intermolecular forces of attraction H₂S or H₂Se?

HOCH₂CH₂OH(s)is classified as which of the following?

Which would be expected to have the higher boiling point NH₃ or PH₃?

Each of the following substances is a liquid at -50°C.Place these liquids in order of increasing vapor pressure: dimethyl ether (CH₃OCH₃), propane (C₃H₈), and ethanol (CH₃CH₂OH)_.

Boron nitride, BN₃, melts at approximately at 3,000°C under high pressure.This material is almost as hard as diamond.What kind of crystal is this?

Indicate all the types of intermolecular forces of attraction in C₂H₆(g).

Which of the following constants is/are needed to calculate the amount of energy required to heat 30.5g of H₂O(s)at -25.0°C to H₂O(l)at 55.0°C? $\Delta$ H_fus (H₂O) II. $\Delta$ H_vap (H₂O) III.specific heat of H₂O(s) IV.specific heat of H₂O(l) V.specific heat of H₂O(g)

How much energy (heat)is required to convert 25.5 g of H₂O(l)at 35.0°C to H₂O(g)at 115.0°C?

Indicate all the types of intermolecular forces of attraction in SF₄(g).

The boiling points of propanol (CH₃CH₂CH₂OH)and pentanol (CH₃CH₂CH₂CH₂CH₂OH)are 97°C and 137°C, respectively.The boiling point of butanol (CH₃CH₂CH₂CH₂OH)is predicted to be:

The intermolecular forces present in C₆H₆ include which of the following? I.dipole-dipole II.ion-dipole III.dispersion IV.hydrogen bonding