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WorksheetsLiquids
Total questions: 21
Worksheet time: 11mins
Substances that can flow are referred to as .................
fluids.
solids.
plasma.
The ability of ............................ to flow allows them to conform to the shape of their containers.
(two choices)
gases
liquids
solids
The interplay between the disruptive motions of particles in a liquid and the attractions among the particles determines the physical properties of liquids.
True
False
Intermolecular attractions reduce the amount of space between the particles in a liquid. Thus, liquids are much ..................... gases.
less dense than
more dense than
same as
Known as condensed states of matter
Liquids
solids
gases
In ............... system, molecules that evaporate can escape from the system.
an isolated
a closed
an open
In a closed system, the molecules can escape.
True
False
The conversion of a .............................. is called vaporization.
liquid to a gas or vapor
liquid to a solid
solid to a gas or vapor
When vaporization occurs at the surface of a liquid that is called boiling.
True
False
During ........................................, only those molecules with a certain minimum kinetic energy can escape from the surface of the liquid.
freezing
condensation
evaporation
A measure of the force exerted by a ....................... is called vapor pressure.
gas inside a liquid
gas above a liquid
gas above a solid
In a system at constant vapor pressure, a dynamic equilibrium exists between the vapor and the liquid.
True
False
An increase in the temperature of a contained liquid .................... the vapor pressure.
increases
decreases
doesn't affect
The vapor pressure of a liquid can be determined with a device called a ..................................
thermometer
manometer
voltmeter
The rate of evaporation of a liquid from an open container ....................... as the liquid is heated.
increases
decreases
stays the same
When a liquid is heated to a temperature at which particles throughout the liquid have enough kinetic energy to vaporize, the liquid begins to .............................
freeze
melt
boil
.................................. is the temperature at which the vapor pressure of the liquid is just equal to the external pressure on the liquid.
The boiling point (bp)
The melting point (mp)
The freezing point (fp)
Liquid boils when its vapor pressure is equal to the external pressure.
True
False
liquids always boil at the same temperature
True
False
Although the vapor has the same average kinetic energy as the liquid, its potential energy (or stored energy) is ..........................
much lower
much higher
The normal boiling point is defined as the boiling point of a liquid at a pressure of ................
101.3 kPa.
101.3 Pa.
101.3 atm.
