The normal boiling point of 2,3,4-trimethypentane, C8H18, is 113.47°C, and its heat of vaporization is 37,600 J mol-1. What is its vapor pressure at 105.5°C?

A) 479.7 torr B) 586.6 torr C) 594.1 torr D) 616.2 torr E) 694.4 torr A) 479.7 torr B) 586.6 torr C) 594.1 torr D) 616.2 torr E) 694.4 torr

Arrange the following compounds in order of increasing viscosity: methylene chloride (CH2Cl2); glycerin (C3H5(OH)3); 1,1-ethandiol (C2H4(OH)2); and acetone (C3H6O). Explain your reasoning.

Methylene chloride < acetone < 1,1-ethan

Exam 12: Intermolecular Attractions and the Properties of Liquids and Solids

An unknown solid is hard and brittle with a high melting point. It does not conduct electricity as a solid, but does as a liquid. What kind of crystal best describes this solid?

(Multiple Choice)

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Question 21

Dioxane, C₄H₈O₂, has an enthalpy of fusion of 145.8 J g^-1 and its melting point temperature is 11.0°C. How much heat is required to transform 142 g of solid dioxane, into liquid dioxane, at 11.0°C?

(Multiple Choice)

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Question 22

A unit cell of sodium chloride (face-centered cubic)consists of sodium and chloride ions. How many chloride ions are within this unit cell?

(Multiple Choice)

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Question 23

Which compound is expected to exhibit hydrogen bonding?

(Multiple Choice)

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Question 24

Which compound should have the highest boiling point?

(Multiple Choice)

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Question 25

Why would the coffee purchased in a to-go cup with a lid at the fast food takeout shop remain hot much longer than the coffee you pour into your ceramic cup at home?

(Short Answer)

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Question 26

The normal boiling point of 2,3,4-trimethypentane, C₈H₁₈, is 113.47°C, and its heat of vaporization is 37,600 J mol^-1. What is its vapor pressure at 105.5°C?

(Multiple Choice)

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Question 27

Arrange the following compounds in order of increasing viscosity: methylene chloride (CH₂Cl₂); glycerin (C₃H₅(OH)₃); 1,1-ethandiol (C₂H₄(OH)₂); and acetone (C₃H₆O). Explain your reasoning.

(Essay)

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Question 28

A new compound, boganium sulfide, has been discovered. X-ray crystallographic studies reveal that it has a cubic unit cell with a sulfide ion at each of the corner lattice points, a sulfide ion at the geometric center of the unit cell, and a boganium ion in the center of each of the cube faces in the unit cell. Based on this structure, the formula for the compound should be

(Multiple Choice)

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Question 29

A solid chemical substance whose triple point pressure is 4.60 atmospheres will normally ________ when it is heated to a sufficiently high temperature in the open laboratory.

(Short Answer)

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Question 30

The temperature above which only a solid state and a non-solid exists for a substance is called the ________.

(Short Answer)

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Question 31

A technique used for determining the structure of a crystalline substance is

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Question 32

Describe the essential features of a hydrogen bond.

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Question 33

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

(Multiple Choice)

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Question 34

How many atoms are contained in one unit cell of metallic lanthanum, if it forms a body-centered cubic unit cell?

(Multiple Choice)

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Question 35

A unit cell of sodium chloride (face-centered cubic)consists of sodium and chloride ions. How many sodium ions are within this unit cell?

(Multiple Choice)

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Question 36

Which set of properties below best describes molecular crystalline substances?

(Multiple Choice)

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Question 37

The following questions refer to the phase diagram below. Gas, liquid, and solid phases are all present, but not labeled. -Starting at the temperature and pressure of b, if the temperature is increased at constant pressure, ultimately

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Question 38

The property that measures or describes the magnitude of resistance to flow in a liquid is called

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Question 39

The following questions refer to the diagram below. -At what temperatures do the triple point and critical point occur?

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Question 40

Showing 21 - 40 of 189

Exam 12: Intermolecular Attractions and the Properties of Liquids and Solids

An unknown solid is hard and brittle with a high melting point. It does not conduct electricity as a solid, but does as a liquid. What kind of crystal best describes this solid?

Dioxane, C4H8O2, has an enthalpy of fusion of 145.8 J g-1 and its melting point temperature is 11.0°C. How much heat is required to transform 142 g of solid dioxane, into liquid dioxane, at 11.0°C?

A unit cell of sodium chloride (face-centered cubic)consists of sodium and chloride ions. How many chloride ions are within this unit cell?

Which compound is expected to exhibit hydrogen bonding?

Which compound should have the highest boiling point?

Why would the coffee purchased in a to-go cup with a lid at the fast food takeout shop remain hot much longer than the coffee you pour into your ceramic cup at home?

The normal boiling point of 2,3,4-trimethypentane, C8H18, is 113.47°C, and its heat of vaporization is 37,600 J mol-1. What is its vapor pressure at 105.5°C?

Arrange the following compounds in order of increasing viscosity: methylene chloride (CH2Cl2); glycerin (C3H5(OH)3); 1,1-ethandiol (C2H4(OH)2); and acetone (C3H6O). Explain your reasoning.

A solid chemical substance whose triple point pressure is 4.60 atmospheres will normally ________ when it is heated to a sufficiently high temperature in the open laboratory.

The temperature above which only a solid state and a non-solid exists for a substance is called the ________.

A technique used for determining the structure of a crystalline substance is

Describe the essential features of a hydrogen bond.

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

How many atoms are contained in one unit cell of metallic lanthanum, if it forms a body-centered cubic unit cell?

A unit cell of sodium chloride (face-centered cubic)consists of sodium and chloride ions. How many sodium ions are within this unit cell?

Which set of properties below best describes molecular crystalline substances?

The following questions refer to the phase diagram below. Gas, liquid, and solid phases are all present, but not labeled. -Starting at the temperature and pressure of b, if the temperature is increased at constant pressure, ultimately

The property that measures or describes the magnitude of resistance to flow in a liquid is called

The following questions refer to the diagram below. -At what temperatures do the triple point and critical point occur?

A Very Brief History of Chemistry

Scientific Measurements

Elements, Compounds, and the Periodic Table

The Mole and Stoichiometry

Molecular View of Reactions in Aqueous Solutions

Oxidation-Reduction Reactions

Energy and Chemical Change

The Quantum Mechanical Atom

The Basics of Chemical Bonding

Theories of Bonding and Structure

Properties of Gases

Mixtures at the Molecular Level: Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases, a Molecular Look

Acid-Base Equilibria in Aqueous Solutions

Solubility and Simultaneous Equilibria

Thermodynamics

Electrochemistry

Nuclear Reactions and Their Role in Chemistry

Metal Complexes

Organic Compounds, Polymers, and Biochemicals

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Dioxane, C₄H₈O₂, has an enthalpy of fusion of 145.8 J g^-1 and its melting point temperature is 11.0°C. How much heat is required to transform 142 g of solid dioxane, into liquid dioxane, at 11.0°C?

The normal boiling point of 2,3,4-trimethypentane, C₈H₁₈, is 113.47°C, and its heat of vaporization is 37,600 J mol^-1. What is its vapor pressure at 105.5°C?

Arrange the following compounds in order of increasing viscosity: methylene chloride (CH₂Cl₂); glycerin (C₃H₅(OH)₃); 1,1-ethandiol (C₂H₄(OH)₂); and acetone (C₃H₆O). Explain your reasoning.