Exam 11: Liquids and Intermolecular Forces

In general, the vapor pressure of a substance increases as __________ increases.

In the smectic A liquid-crystalline phase, __________.

Which of the following characteristics would prevent liquid crystal behavior?

On a phase diagram, the critical pressure is __________.

The predominant intermolecular force in (CH₃)₂NH is __________.

A __________ liquid crystal has the least order and is the most liquid-like.

As a solid element melts, the atoms become __________ and they have __________ attraction for one another.

In the ________ liquid crystalline phase, the component molecules are aligned along their long axis and are arranged in layers with the molecules in each plane twisted slightly in relation to the molecules in the planes above and below.

Based on the figure above, the boiling point of diethyl ether under an external pressure of 1.32 atm is __________°C.

The phase diagram of a substance is given above. The region that corresponds to the solid phase is __________.

On a phase diagram, the critical temperature is __________.

The heat of fusion of water is 6.01 kJ/mol. The heat capacity of liquid water is 75.3 J/mol ∙ K. The conversion of 50.0 g of ice at 0.00°C to liquid water at 10.0°C requires __________ kJ of heat.

Of the following substances, only __________ has London dispersion forces as the only intermolecular force.

Of the following, __________ is an exothermic process.

Of the following, __________ is the least volatile.

The principal source of the difference in the normal boiling points of ICl (97°C; molecular mass 162 amu)and Br₂ (59°C; molecular mass 160 amu)is both dipole-dipole interactions and London dispersion forces.

The shape of a liquid's meniscus is determined by __________.

Which of the following molecules has hydrogen bonding as its only intermolecular force?

As a gaseous element condenses, the atoms become __________ and they have __________ attraction for one another.