Question 1

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 ∘\circ∘ C to H2O(l)  at 55.0 ∘\circ∘ C
I.  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)

Accepted Answer

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

Question 2

Find the temperature at which water boils on a day in the mountains when the barometric pressure is 593 mmHg. (Given: the heat of vaporization of water is 40.79 kJ/mol)

Accepted Answer

A)   41.5 ∘\circ∘ C
B)   68.1 ∘\circ∘ C
C)   93.1 ∘\circ∘ C
D)   97.0 ∘\circ∘ C
E)   117 ∘\circ∘ C F) A) and B)
G) None of the above

Question 3

CH4 has a higher boiling point than CH3OH.

Accepted Answer

A) True 
 B)False

Question 4

HOCH2CH2OH(s)  is classified as a/an

Accepted Answer

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

Question 5

Vanadium crystallizes in a body-centered cubic lattice, and the length of the edge of a unit cell is 305 pm. What is the density of V

Accepted Answer

A)   5.96 * 10-30 g/cm3
B)   2.98 * 10-6 g/cm3
C)   2.98 g/cm3
D)   5.96 g/cm3
E)   11.9 g/cm3F) B) and E)
G) A) and C)

Question 6

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3. What is the radius of the platinum atom

Accepted Answer

A)   69 pm
B)   98 pm
C)   139 pm
D)   196 pm
E)   277 pmF) D) and E)
G) C) and D)

Question 7

Which of the following liquids would have the lowest viscosity at 25 ∘\circ∘ C  \circ C   A)  A B)  B C)  C D)  D E)  E " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   E F) B) and C)
G) A) and C)

Question 8

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

Accepted Answer

A)   HBr
B)   HCl
C)   HF
D)   HIE) All of the above
F) B) and C)

Question 9

How much energy (heat)  is required to convert 25.5 g of H2O(l)  at 35.0 ∘\circ∘ C to H2O(g)  at 115.0 ∘\circ∘ C

specific heat of ice:  2.09 J/g⋅∘CΔHfus=6.02 kJ/mol \quad 2.09 \mathrm{~J} / \mathrm{g} \cdot{ }^{\circ} \mathrm{C} \quad \Delta \mathrm{H}_{\mathrm{fus}}=6.02 \mathrm{~kJ} / \mathrm{mol} 2.09 J/g⋅∘CΔHfus​=6.02 kJ/mol  
specific heat of water:  4.18 J/g⋅∘CΔHvap=40.7 kJ/mo 4.18 \mathrm{~J} / \mathrm{g}{ \cdot}^{\circ} \mathrm{C} \quad \Delta \mathrm{H}_{\mathrm{vap}}=40.7 \mathrm{~kJ} / \mathrm{mo} 4.18 J/g⋅∘CΔHvap​=40.7 kJ/mo . 
specific hast of steam:  1.84 J/g⋅∘C 1.84 \mathrm{~J} / \mathrm{g} \cdot{ }^{\circ} \mathrm{C} 1.84 J/g⋅∘C

Accepted Answer

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

Question 10

Octane, C8H18, boils at 125$\circ$C as compared to water, which boils at 100$\circ$C. This information suggests that the dispersion forces in nonpolar octane molecules are stronger than dispersion forces and hydrogen bonding in water.

Accepted Answer

A) True 
 B)False

Question 11

NH3 has a higher boiling point than PH3.

Accepted Answer

A) True 
 B)False

Question 12

The freezing point of a liquid does not change as the atmospheric pressure changes.

Accepted Answer

A) True 
 B)False

Question 13

Find the temperature at which ethanol boils on a day in the mountains when the barometric pressure is 547 mmHg. (Given: The heat of vaporization of ethanol is 39.3 kJ/mol; the normal boiling point of ethanol is 78.3 ∘\circ∘ C.)

Accepted Answer

A)   10.0 ∘\circ∘ C
B)   69.9 ∘\circ∘ C
C)   74.6 ∘\circ∘ C
D)   76.5 ∘\circ∘ C
E)   77.9 ∘\circ∘ C F) A) and E)
G) A) and D)

Question 14

Use the graph of vapor pressure to determine the normal boiling point of CHCl3. 3.   A)  19 \circ C B)  52 \circ C C)  60 \circ C D)  64 \circ C E)  70 \circ C " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   19 ∘\circ∘ C
B)   52 ∘\circ∘ C
C)   60 ∘\circ∘ C
D)   64 ∘\circ∘ C
E)   70 ∘\circ∘ C F) A) and B)
G) A) and C)

Question 15

C(CH3)4 has a higher vapor pressure than CH3CH2CH2CH2CH3.

Accepted Answer

A) True 
 B)False

Question 16

C8H18 has a higher vapor pressure than C4H10.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A)   SiH4
B)   H2
C)   H2S
D)   CH4
E)   CH3NH2F) A) and E)
G) A) and B)

Question 18

Solid iodine has a vapor pressure of 1.0 mmHg at 39 ∘\circ∘ C. How many moles of iodine will sublime into a 500 mL flask at this temperature If the volume of the flask is doubled at constant temperature, what will happen to the equilibrium vapor pressure of I2
(Assume some solid I2 is always present in the container.)

Accepted Answer

A)   2.1 * 10-4 mol; vapor pressure increases
B)   2.0 * 10-2 mol; vapor pressure increases
C)   2.6 * 10-5 mol; no change in vapor pressure
D)   2.1 * 10-4 mol; no change in vapor pressure
E)   2.6 * 10-5 mol; vapor pressure decreases F) D) and E)
G) B) and C)

Question 19

Acetic acid has a heat of fusion of 10.8 kJ/mol and a heat of vaporization of 24.3 kJ/mol. What is the expected value for the heat of sublimation of acetic acid

Accepted Answer

A)   35.1 kJ/mol
B)   -13.5 kJ/mol
C)   +13.5 kJ/mol
D)   -35.1 kJ/mol
E)   Not enough information is given to answer the question.F) A) and E)
G) All of the above

Question 20

3.59 g of water was introduced into an evacuated 1.50 L flask at 30 ∘\circ∘ C. What mass of water will evaporate (Vapor pressure of water at 30 ∘\circ∘ C is 31.82 mmHg.)

Accepted Answer

A)   2.52 * 10-3 g
B)   0.04187 g
C)   0.0455g
D)   0.4187 g
E)   0.455 g F) A) and E)
G) A) and D)

Exam 11: Intermolecular Forces and Liquids and Solids

Correct Answer
verified

Use the graph of vapor pressure to determine the normal boiling point of CHCl₃. $Use the graph of vapor pressure to determine the normal boiling point of CHCl<sub>3</sub>. A) 19<sup> \circ </sup>C B) 52<sup> \circ </sup>C C) 60<sup> \circ </sup>C D) 64<sup> \circ </sup>C E) 70<sup> \circ </sup>C$

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

Correct Answer
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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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C₈H₁₈ has a higher vapor pressure than C₄H₁₀.

Correct Answer
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CH₄ has a higher boiling point than CH₃OH.

Correct Answer
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NH₃ has a higher boiling point than PH₃.

Correct Answer
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Vanadium crystallizes in a body-centered cubic lattice, and the length of the edge of a unit cell is 305 pm. What is the density of V

Correct Answer
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Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm³. What is the radius of the platinum atom

Correct Answer
verified

Which of the following liquids would have the lowest viscosity at 25^$\circ$C $Which of the following liquids would have the lowest viscosity at 25<sup> \circ </sup>C A) A B) B C) C D) D E) E$

Correct Answer
verified

Find the temperature at which ethanol boils on a day in the mountains when the barometric pressure is 547 mmHg. (Given: The heat of vaporization of ethanol is 39.3 kJ/mol; the normal boiling point of ethanol is 78.3^$\circ$C.)

Correct Answer
verified

Octane, C₈H₁₈, boils at 125^$\circ$C as compared to water, which boils at 100^$\circ$C. This information suggests that the dispersion forces in nonpolar octane molecules are stronger than dispersion forces and hydrogen bonding in water.

Correct Answer
verified

C(CH₃)₄ has a higher vapor pressure than CH₃CH₂CH₂CH₂CH₃.

Correct Answer
verified

The freezing point of a liquid does not change as the atmospheric pressure changes.

Correct Answer
verified

Acetic acid has a heat of fusion of 10.8 kJ/mol and a heat of vaporization of 24.3 kJ/mol. What is the expected value for the heat of sublimation of acetic acid

Correct Answer
verified

Find the temperature at which water boils on a day in the mountains when the barometric pressure is 593 mmHg. (Given: the heat of vaporization of water is 40.79 kJ/mol)

Correct Answer
verified

HOCH₂CH₂OH(s) is classified as a/an

Correct Answer
verified

3.59 g of water was introduced into an evacuated 1.50 L flask at 30^$\circ$C. What mass of water will evaporate (Vapor pressure of water at 30^$\circ$C is 31.82 mmHg.)

Correct Answer
verified

Correct Answer
verified

Exam 11: Intermolecular Forces and Liquids and Solids

Correct AnswerverifiedShow Answer

Use the graph of vapor pressure to determine the normal boiling point of CHCl3.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

C8H18 has a higher vapor pressure than C4H10.

Correct AnswerverifiedShow Answer

CH4 has a higher boiling point than CH3OH.

Correct AnswerverifiedShow Answer

NH3 has a higher boiling point than PH3.

Correct AnswerverifiedShow Answer

Vanadium crystallizes in a body-centered cubic lattice, and the length of the edge of a unit cell is 305 pm. What is the density of V

Correct AnswerverifiedShow Answer

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3. What is the radius of the platinum atom

Correct AnswerverifiedShow Answer

Which of the following liquids would have the lowest viscosity at 25 ∘\circ∘ C

Correct AnswerverifiedShow Answer

Find the temperature at which ethanol boils on a day in the mountains when the barometric pressure is 547 mmHg. (Given: The heat of vaporization of ethanol is 39.3 kJ/mol; the normal boiling point of ethanol is 78.3 ∘\circ∘ C.)

Correct AnswerverifiedShow Answer

Octane, C8H18, boils at 125 ∘\circ∘ C as compared to water, which boils at 100 ∘\circ∘ C. This information suggests that the dispersion forces in nonpolar octane molecules are stronger than dispersion forces and hydrogen bonding in water.

Correct AnswerverifiedShow Answer

C(CH3)4 has a higher vapor pressure than CH3CH2CH2CH2CH3.

Correct AnswerverifiedShow Answer

The freezing point of a liquid does not change as the atmospheric pressure changes.

Correct AnswerverifiedShow Answer

Acetic acid has a heat of fusion of 10.8 kJ/mol and a heat of vaporization of 24.3 kJ/mol. What is the expected value for the heat of sublimation of acetic acid

Correct AnswerverifiedShow Answer

Find the temperature at which water boils on a day in the mountains when the barometric pressure is 593 mmHg. (Given: the heat of vaporization of water is 40.79 kJ/mol)

Correct AnswerverifiedShow Answer

HOCH2CH2OH(s) is classified as a/an

Correct AnswerverifiedShow Answer

3.59 g of water was introduced into an evacuated 1.50 L flask at 30 ∘\circ∘ C. What mass of water will evaporate (Vapor pressure of water at 30 ∘\circ∘ C is 31.82 mmHg.)

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
verified

Use the graph of vapor pressure to determine the normal boiling point of CHCl₃. $Use the graph of vapor pressure to determine the normal boiling point of CHCl<sub>3</sub>. A) 19<sup> \circ </sup>C B) 52<sup> \circ </sup>C C) 60<sup> \circ </sup>C D) 64<sup> \circ </sup>C E) 70<sup> \circ </sup>C$

Correct Answer
verified

Correct Answer
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Correct Answer
verified

Correct Answer
verified

C₈H₁₈ has a higher vapor pressure than C₄H₁₀.

Correct Answer
verified

CH₄ has a higher boiling point than CH₃OH.

Correct Answer
verified

NH₃ has a higher boiling point than PH₃.

Correct Answer
verified

Correct Answer
verified

Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm³. What is the radius of the platinum atom

Correct Answer
verified

Which of the following liquids would have the lowest viscosity at 25^$\circ$C $Which of the following liquids would have the lowest viscosity at 25<sup> \circ </sup>C A) A B) B C) C D) D E) E$

Correct Answer
verified

Find the temperature at which ethanol boils on a day in the mountains when the barometric pressure is 547 mmHg. (Given: The heat of vaporization of ethanol is 39.3 kJ/mol; the normal boiling point of ethanol is 78.3^$\circ$C.)

Correct Answer
verified

Octane, C₈H₁₈, boils at 125^$\circ$C as compared to water, which boils at 100^$\circ$C. This information suggests that the dispersion forces in nonpolar octane molecules are stronger than dispersion forces and hydrogen bonding in water.

Correct Answer
verified

C(CH₃)₄ has a higher vapor pressure than CH₃CH₂CH₂CH₂CH₃.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

HOCH₂CH₂OH(s) is classified as a/an

Correct Answer
verified

3.59 g of water was introduced into an evacuated 1.50 L flask at 30^$\circ$C. What mass of water will evaporate (Vapor pressure of water at 30^$\circ$C is 31.82 mmHg.)

Correct Answer
verified

Correct Answer
verified