Given the data below, determine the molar enthalpy change of vaporization of COCl2. COCl2, P1 = 40 mmHg, t1 = -50.3°C, P2 = 100 mmHg, t2 = -35.6°C

A) 0.518 kJ/mol B) 27.4 kJ/mol C) 4.32 kJ/mol D) 0.928 kJ/mol E) 0.112 kJ/mol A) 0.518 kJ/mol B) 27.4 kJ/mol C) 4.32 kJ/mol D) 0.928 kJ/mol E) 0.112 kJ/mol

Arrange the following compounds in order of increasing viscosity: I) 1-propanol, CH3CH2CH2OH; II) 1,2-propanediol, CH3CH(OH)CH2OH; III) 1,2,3-propanetriol, (glycerol), HOCH2CH(OH)CH2OH.

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

Arrange the following compounds in order of increasing boiling point: pentane (CH3CH2CH2CH2CH3), methyl butane (CH3CH(CH3)CH2CH3), neopentane (CH3C(CH3)3).

A) pentane, methyl butane, neopentane B) neopentane, methyl butane, pentane C) neopentane, pentane, methyl butane D) pentane, neopentane, methyl butane E) methyl butane, pentane, neopentane A) pentane, methyl butane, neopentane B) neopentane, methyl butane, pentane C) neopentane, pentane, methyl butane D) pentane, neopentane, methyl butane E) methyl butane, pentane, neopentane

Exam 12: Intermolecular Forces: Liquids and Solids

All sides are equal in length and all angles are right angles. There is an atom at each corner and one at the center of each side. This is a face-centered cubic cell.

(True/False)

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Question 81

The process in which a gas is transformed into a solid is called solidification.

(True/False)

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Question 82

The heat of deposition equals the negative of the heat of sublimation.

(True/False)

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Question 83

An atom at the corner of cubic unit cell is shared among:

(Multiple Choice)

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Question 84

The heat of fusion for napthalene (C₁₀H₈) is 18.98 kJ/mol and for sodium is 2.60 kJ/mol. The amount of heat that would melt 37.0 grams of napthalene would melt how many grams of sodium?

(Multiple Choice)

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Question 85

Ethyl alcohol (CH₃CH₂OH) has a heat of fusion of 5.01 kJ/mol. How much heat in kJ is required to melt 137g of ethyl alcohol?

(Multiple Choice)

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Question 86

Which of the following describe the critical point of a liquid? I) the temperature and pressure at which a liquid's meniscus disappears II) the point where the vapor pressure curve intersects the fusion temperature curve III) the highest temperature and pressure at which a liquid can exist IV) the highest temperature at which it is possible to obtain a liquid from its vapor by increasing pressure

(Multiple Choice)

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Question 87

All sides are equal in length and all angles are right angles. There is an atom at each corner and one in the absolute center. This is a ________.

(Multiple Choice)

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Question 88

A compound of iron and sulfur crystallizes in a lattice pattern described as cubic closest packed sulfide ions, with iron ions in all octahedral sites. What is its empirical formula?

(Multiple Choice)

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Question 89

Given the data below, determine the molar enthalpy change of vaporization of COCl₂. COCl₂, P1 = 40 mmHg, t1 = -50.3°C, P2 = 100 mmHg, t2 = -35.6°C

(Multiple Choice)

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Question 90

The property that causes water to have a concave meniscus but mercury to have a convex meniscus is ________.

(Multiple Choice)

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Question 91

Arrange the following compounds in order of increasing viscosity: I) 1-propanol, CH₃CH₂CH₂OH; II) 1,2-propanediol, CH₃CH(OH)CH₂OH; III) 1,2,3-propanetriol, (glycerol), HOCH₂CH(OH)CH₂OH.

(Multiple Choice)

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Question 92

The heat of fusion for water is 6.01 kJ/mol and for ethyl alcohol is 5.01 kJ/mol. The amount of heat that would melt 25.0 grams of water would melt how many grams of ethyl alcohol?

(Multiple Choice)

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Question 93

Arrange the following compounds in order of increasing boiling point: pentane (CH₃CH₂CH₂CH₂CH₃), methyl butane (CH₃CH(CH₃)CH₂CH₃), neopentane (CH₃C(CH₃)₃).

(Multiple Choice)

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Question 94

Which of the following keeps the rate of vaporization unchanged?

(Multiple Choice)

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Question 95

The phenomenon of supercooling refers to the existence of a metastable liquid at a temperature below that of its sublimation point.

(True/False)

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Question 96

H₂NCH₂CH₂NH₂ probably has a higher boiling point at 1.00 atm pressure than CH₃CH₂CH₂NH₂.

(True/False)

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Question 97

Three types of holes of the cubic closest packed structure are:

(Multiple Choice)

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Question 98

Flask A has a volume of 0.50 L and contains 50 g of a volatile liquid. Flask B has a volume of 1.0 L and contains 25 g of the same liquid. Both flasks are stoppered and both are at 30°C. The ratio of the vapor pressure of the liquid in Flask A to that in Flask B is:

(Multiple Choice)

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Question 99

Given the data below, determine the normal boiling point of liquid Rb. P1 = 400 mmHg, t1 = 620°C, ΔHvap = 78.5 kJ/mol

(Multiple Choice)

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Question 100

Showing 81 - 100 of 102

Exam 12: Intermolecular Forces: Liquids and Solids

All sides are equal in length and all angles are right angles. There is an atom at each corner and one at the center of each side. This is a face-centered cubic cell.

The process in which a gas is transformed into a solid is called solidification.

The heat of deposition equals the negative of the heat of sublimation.

An atom at the corner of cubic unit cell is shared among:

The heat of fusion for napthalene (C10H8) is 18.98 kJ/mol and for sodium is 2.60 kJ/mol. The amount of heat that would melt 37.0 grams of napthalene would melt how many grams of sodium?

Ethyl alcohol (CH3CH2OH) has a heat of fusion of 5.01 kJ/mol. How much heat in kJ is required to melt 137g of ethyl alcohol?

All sides are equal in length and all angles are right angles. There is an atom at each corner and one in the absolute center. This is a ________.

A compound of iron and sulfur crystallizes in a lattice pattern described as cubic closest packed sulfide ions, with iron ions in all octahedral sites. What is its empirical formula?

Given the data below, determine the molar enthalpy change of vaporization of COCl2. COCl2, P1 = 40 mmHg, t1 = -50.3°C, P2 = 100 mmHg, t2 = -35.6°C

The property that causes water to have a concave meniscus but mercury to have a convex meniscus is ________.

Arrange the following compounds in order of increasing viscosity: I) 1-propanol, CH3CH2CH2OH; II) 1,2-propanediol, CH3CH(OH)CH2OH; III) 1,2,3-propanetriol, (glycerol), HOCH2CH(OH)CH2OH.

The heat of fusion for water is 6.01 kJ/mol and for ethyl alcohol is 5.01 kJ/mol. The amount of heat that would melt 25.0 grams of water would melt how many grams of ethyl alcohol?

Arrange the following compounds in order of increasing boiling point: pentane (CH3CH2CH2CH2CH3), methyl butane (CH3CH(CH3)CH2CH3), neopentane (CH3C(CH3)3).

Which of the following keeps the rate of vaporization unchanged?

The phenomenon of supercooling refers to the existence of a metastable liquid at a temperature below that of its sublimation point.

H2NCH2CH2NH2 probably has a higher boiling point at 1.00 atm pressure than CH3CH2CH2NH2.

Three types of holes of the cubic closest packed structure are:

Flask A has a volume of 0.50 L and contains 50 g of a volatile liquid. Flask B has a volume of 1.0 L and contains 25 g of the same liquid. Both flasks are stoppered and both are at 30°C. The ratio of the vapor pressure of the liquid in Flask A to that in Flask B is:

Given the data below, determine the normal boiling point of liquid Rb. P1 = 400 mmHg, t1 = 620°C, ΔHvap = 78.5 kJ/mol

Matter - Its Properties and Measurement

Atoms and the Atomic Theory

Chemical Compounds

Chemical Reactions

Introduction to Reactions in Aqueous Solutions

Gases

Thermochemistry

Electrons in Atoms

The Periodic Table and Some Atomic Properties

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Additional Aspects

Solutions and Their Physical Properties

Chemical Kinetics

Principles of Chemical Equilibrium

Acids and Bases

Additional Aspects of Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Spontaneous Change: Entropy and Free Energy

Electrochemistry

Main Group Elements I: Groups 1, 2, 13, and 14

Main Group Elements II: Groups 18, 17, 16, 15, and Hydrogen

The Transition Elements

Complex Ions and Coordination Compounds

Nuclear Chemistry 1-41

Structures of Organic Compounds

Reactions of Organic Compounds

Chemistry of the Living State

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The heat of fusion for napthalene (C₁₀H₈) is 18.98 kJ/mol and for sodium is 2.60 kJ/mol. The amount of heat that would melt 37.0 grams of napthalene would melt how many grams of sodium?

Ethyl alcohol (CH₃CH₂OH) has a heat of fusion of 5.01 kJ/mol. How much heat in kJ is required to melt 137g of ethyl alcohol?

Given the data below, determine the molar enthalpy change of vaporization of COCl₂. COCl₂, P1 = 40 mmHg, t1 = -50.3°C, P2 = 100 mmHg, t2 = -35.6°C

Arrange the following compounds in order of increasing viscosity: I) 1-propanol, CH₃CH₂CH₂OH; II) 1,2-propanediol, CH₃CH(OH)CH₂OH; III) 1,2,3-propanetriol, (glycerol), HOCH₂CH(OH)CH₂OH.

Arrange the following compounds in order of increasing boiling point: pentane (CH₃CH₂CH₂CH₂CH₃), methyl butane (CH₃CH(CH₃)CH₂CH₃), neopentane (CH₃C(CH₃)₃).

H₂NCH₂CH₂NH₂ probably has a higher boiling point at 1.00 atm pressure than CH₃CH₂CH₂NH₂.