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Exam 11: Intermolecular Forces and the Physical Properties of Liquids and Solids

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Question 21

Multiple Choice

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For which of the following pure substances are the intermolecular interactions entirely due to dispersion forces?

A) C₂H₆
B) CH₃OCH₃
C) NO₂
D) H₂S
E) Ca(NO₃) ₂

F) A) and B)
G) B) and D)

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Question 22

Multiple Choice

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The strongest intermolecular interactions between ethyl alcohol (CH₃CH₂OH) molecules arise from

A) dipole-dipole forces.
B) London dispersion forces.
C) hydrogen bonding.
D) ion-dipole interactions.
E) carbon-oxygen bonds.

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

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Question 23

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Below is the phase diagram for sulfur.Which phase has the highest density at 119°C?

Which of the following pure substances has the highest boiling point?

___________ ____________ are described by an instantaneous dipole.

Poor conductor of heat and electricity,soft,and low melting point are properties which describe a(n)_______________ crystal.

Which kinds of intermolecular forces exist between propane molecules? I.dispersion forces II) dipole-dipole interactions III) ion-dipole interactions

Only molecules which do not have dipole moments can experience dispersion forces.

_______________ ________ are solids that lack a regular three-dimensional arrangement of atoms.

The shape of the water-to-glass meniscus results from the strong adhesive forces between glass and water.

Choose the response that lists the member of each of the following pairs that has the higher boiling point. I.H₂O or KI,II.HF or HI,III.Cl₂ or Br₂

Which substance has the lowest vapor pressure at room temperature?

Variable melting point,variable hardness,and good conductor of heat and electricity are properties which describe a(n)_______________ crystal.

What types of intermolecular forces exist between hydrogen fluoride molecules? I.London forces II) dipole-dipole interactions III) hydrogen bonding IV) ion-dipole interactions

___________ ____________ is another name given for dispersion forces.

Which of the following pure substances has the highest boiling point?

Which of the following atoms does not participate in hydrogen bonding?

Ethanol (C₂H₅-OH)will have a greater viscosity than ethylene glycol (HO-CH₂CH₂-OH)at the same temperature.

Solids are generally most stable in crystalline form.

Which liquid is expected to have the larger surface tension at a given temperature,CCl₄ or H₂O? Briefly explain.