Question 1

Based on the phase diagram shown below, how will the melting point of the substance change if the pressure is increased above 1 atm

Accepted Answer

A)   The melting point will decrease.
B)   The melting point will remain the same.
C)   The melting point will increase.
D)   The substance will not melt at pressures of 1 atm and above; instead, the solid sublimes to form the gas phase.

Question 2

MgO has the same crystal structure as NaCl, face-centered cubic. How many oxide ions surround each Mg2+ ion as nearest neighbors

Accepted Answer

A)   4
B)   6
C)   8
D)   10
E)   12

Question 3

Suppose the atoms in a two-dimensional crystal have the following arrangement:  How many atoms are in one unit cell
A) One
B) Two
C) Three
D) Four
E) None of the above

Accepted Answer

A) True 
 B)False

Question 4

W(s)  is classified as a/an

Accepted Answer

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

Question 5

Calculate the amount of enthalpy required to heat 25.0 g of solid benzene (C6H6)  at -10 ∘\circ∘ C to liquid benzene at 20.0 ∘\circ∘ C. Thermodynamic data for benzene: specific heat of solid benzene = 1.52 J/g· ∘\circ∘ C; specific heat of liquid benzene = 1.73 J/g· ∘\circ∘ C; melting point = 5.5 ∘\circ∘ C;  Δ\DeltaΔ Hfus = 9.9 kJ/mol.

Accepted Answer

A)   3.8 kJ
B)   4.1 kJ
C)   4.4 kJ
D)   4.7 kJ
E)   None of the above

Question 6

The vapor pressure of a liquid in a closed container depends upon

Accepted Answer

A)   the amount of liquid.
B)   the surface area of the liquid.
C)   the volume of the container.
D)   the temperature.
E)   none of the above.

Question 7

Iron crystallizes in a body-centered cubic unit. The edge of this cell is 287 pm. What is the density of iron

Accepted Answer

A)   7.86 g/cm3
B)   7.66 g/cm3
C)   7.46 g/cm3
D)   7.26 g/cm3
E)   None of the above

Question 8

The liquid phase exists at the point labeled b.

Accepted Answer

A) True 
 B)False

Question 9

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

A)   Two
B)   Four
C)   Six
D)   Eight
E)   None of the above

Question 10

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

Accepted Answer

A)   Br2
B)   Cl2
C)   F2
D)   I2

Question 11

Which of the following is not true with regard to water

Accepted Answer

A)   Water has a high heat capacity.
B)   Water has an unusually high boiling point.
C)   Water can form hydrogen bonds.
D)   Ice is more dense than liquid water.
E)   Water is a polar molecule.

Question 12

Which of the following would be expected to have the highest vapor pressure at room temperature

Accepted Answer

A)   ethanol, bp = 78 ∘\circ∘ C
B)   methanol, bp = 65 ∘\circ∘ C
C)   water, bp = 100 ∘\circ∘ C
D)   acetone, bp = 56 ∘\circ∘ C

Question 13

Which of following can form hydrogen bonds with water molecules
(1)  Na+ (2)  CH3COOH (3)  C2H6 (4)  CH3NH2

Accepted Answer

A)   (1)  and (2) 
B)   (1)  and (3) 
C)   (2)  and (3) 
D)   (2)  and (4) 
E)   (3)  and (4)

Question 14

The molar enthalpy of vaporization of carbon disulfide is 26.74 kJ/mol, and its normal boiling point is 46 ∘\circ∘ C. What is the vapor pressure of CS2 at 0 ∘\circ∘ C

Accepted Answer

A)   4160 torr
B)   447 torr
C)   313 torr
D)   139 torr
E)   5.47 torr

Question 15

BaCl2 crystallizes such that the Ba2+ ions are in a face-centered cubic arrangement and the Cl- ions are in the holes of the lattice (fluorite structure) . How many Cl- ions are present in one unit cell of this crystal

Accepted Answer

A)   1
B)   2
C)   4
D)   6
E)   8

Question 16

Which one of the following crystallizes in a metallic lattice

Accepted Answer

A)   C
B)   NaMnO4
C)   K
D)   LiClO4
E)   K2Cr2O7

Question 17

All intermolecular forces must be overcome in order for a substance to undergo a phase change from a solid to a liquid.

Accepted Answer

A) True 
 B)False

Question 18

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

Accepted Answer

A)   Dispersion and Dipole-dipole
B)   Dipole-dipole and Ionic
C)   Ion-dipole and Hydrogen bonding
D)   Hydrogen bonding and Dispersion
E)   Dispersion

Question 19

Indicate all the types of intermolecular forces of attraction in SO2(l) .

Accepted Answer

A)   Dispersion and Dipole-dipole
B)   Dipole-dipole and Ionic
C)   Ion-dipole and Hydrogen bonding
D)   Hydrogen bonding and Dispersion
E)   Dispersion

Question 20

Calculate the amount of heat that must be absorbed by 10.0 g of ice at -20 ∘\circ∘ C to convert it to liquid water at 60.0 ∘\circ∘ C. Given: specific heat (ice)  = 2.1 J/g· ∘\circ∘ C; specific heat (water)  = 4.18 J/g· ∘\circ∘ C;  Δ\DeltaΔ Hfus = 6.0 kJ/mol.

Accepted Answer

A)   63 kJ
B)   7.5 J
C)   420 J
D)   2,900 J
E)   6,300 J

Exam 11: Intermolecular Forces and Liquids and Solids

Indicate all the types of intermolecular forces of attraction in SO₂(l) .

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

Correct Answer
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BaCl₂ crystallizes such that the Ba²⁺ ions are in a face-centered cubic arrangement and the Cl^- ions are in the holes of the lattice (fluorite structure) . How many Cl^- ions are present in one unit cell of this crystal

Correct Answer
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Which one of the following crystallizes in a metallic lattice

Correct Answer
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The liquid phase exists at the point labeled b.

Correct Answer
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All intermolecular forces must be overcome in order for a substance to undergo a phase change from a solid to a liquid.

Correct Answer
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Iron crystallizes in a body-centered cubic unit. The edge of this cell is 287 pm. What is the density of iron

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

Correct Answer
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Which of following can form hydrogen bonds with water molecules (1) Na⁺ (2) CH₃COOH (3) C₂H₆ (4) CH₃NH₂

Correct Answer
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MgO has the same crystal structure as NaCl, face-centered cubic. How many oxide ions surround each Mg²⁺ ion as nearest neighbors

Correct Answer
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Which of the following is not true with regard to water

Correct Answer
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The vapor pressure of a liquid in a closed container depends upon

Correct Answer
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Calculate the amount of heat that must be absorbed by 10.0 g of ice at -20^$\circ$C to convert it to liquid water at 60.0^$\circ$C. Given: specific heat (ice) = 2.1 J/g·^$\circ$C; specific heat (water) = 4.18 J/g·^$\circ$C; $\Delta$ H_fus = 6.0 kJ/mol.

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

Correct Answer
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Based on the phase diagram shown below, how will the melting point of the substance change if the pressure is increased above 1 atm

Correct Answer
verified

Suppose the atoms in a two-dimensional crystal have the following arrangement: How many atoms are in one unit cell A) One B) Two C) Three D) Four E) None of the above

Correct Answer
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W(s) is classified as a/an

Correct Answer
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Which of the following would be expected to have the highest vapor pressure at room temperature

Correct Answer
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The molar enthalpy of vaporization of carbon disulfide is 26.74 kJ/mol, and its normal boiling point is 46^$\circ$C. What is the vapor pressure of CS₂ at 0^$\circ$C

Correct Answer
verified

Exam 11: Intermolecular Forces and Liquids and Solids

Indicate all the types of intermolecular forces of attraction in SO2(l) .

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

BaCl2 crystallizes such that the Ba2+ ions are in a face-centered cubic arrangement and the Cl- ions are in the holes of the lattice (fluorite structure) . How many Cl- ions are present in one unit cell of this crystal

Correct AnswerverifiedShow Answer

Which one of the following crystallizes in a metallic lattice

Correct AnswerverifiedShow Answer

The liquid phase exists at the point labeled b.

Correct AnswerverifiedShow Answer

All intermolecular forces must be overcome in order for a substance to undergo a phase change from a solid to a liquid.

Correct AnswerverifiedShow Answer

Iron crystallizes in a body-centered cubic unit. The edge of this cell is 287 pm. What is the density of iron

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of following can form hydrogen bonds with water molecules (1) Na+ (2) CH3COOH (3) C2H6 (4) CH3NH2

Correct AnswerverifiedShow Answer

MgO has the same crystal structure as NaCl, face-centered cubic. How many oxide ions surround each Mg2+ ion as nearest neighbors

Correct AnswerverifiedShow Answer

Which of the following is not true with regard to water

Correct AnswerverifiedShow Answer

The vapor pressure of a liquid in a closed container depends upon

Correct AnswerverifiedShow Answer

Calculate the amount of heat that must be absorbed by 10.0 g of ice at -20 ∘\circ∘ C to convert it to liquid water at 60.0 ∘\circ∘ C. Given: specific heat (ice) = 2.1 J/g· ∘\circ∘ C; specific heat (water) = 4.18 J/g· ∘\circ∘ C; Δ\DeltaΔ Hfus = 6.0 kJ/mol.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Based on the phase diagram shown below, how will the melting point of the substance change if the pressure is increased above 1 atm

Correct AnswerverifiedShow Answer

Suppose the atoms in a two-dimensional crystal have the following arrangement: How many atoms are in one unit cell A) One B) Two C) Three D) Four E) None of the above

Correct AnswerverifiedShow Answer

W(s) is classified as a/an

Correct AnswerverifiedShow Answer

Which of the following would be expected to have the highest vapor pressure at room temperature

Correct AnswerverifiedShow Answer

The molar enthalpy of vaporization of carbon disulfide is 26.74 kJ/mol, and its normal boiling point is 46 ∘\circ∘ C. What is the vapor pressure of CS2 at 0 ∘\circ∘ C

Correct AnswerverifiedShow Answer

Indicate all the types of intermolecular forces of attraction in SO₂(l) .

Correct Answer
verified

Correct Answer
verified

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

Correct Answer
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BaCl₂ crystallizes such that the Ba²⁺ ions are in a face-centered cubic arrangement and the Cl^- ions are in the holes of the lattice (fluorite structure) . How many Cl^- ions are present in one unit cell of this crystal

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Which of following can form hydrogen bonds with water molecules (1) Na⁺ (2) CH₃COOH (3) C₂H₆ (4) CH₃NH₂

Correct Answer
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MgO has the same crystal structure as NaCl, face-centered cubic. How many oxide ions surround each Mg²⁺ ion as nearest neighbors

Correct Answer
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Correct Answer
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Correct Answer
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Calculate the amount of heat that must be absorbed by 10.0 g of ice at -20^$\circ$C to convert it to liquid water at 60.0^$\circ$C. Given: specific heat (ice) = 2.1 J/g·^$\circ$C; specific heat (water) = 4.18 J/g·^$\circ$C; $\Delta$ H_fus = 6.0 kJ/mol.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The molar enthalpy of vaporization of carbon disulfide is 26.74 kJ/mol, and its normal boiling point is 46^$\circ$C. What is the vapor pressure of CS₂ at 0^$\circ$C

Correct Answer
verified