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The Nature of Liquids
vocab and main ideas -13.2
20
Chemistry
11th Grade
04/15/2009

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Term
vaporization
Definition
the conversion of liquid to a gas or a vapor
Term
evaporation
Definition
vaporization that occurs at the surface of a liquid that is not boiling
Term
vapor pressure
Definition
a measure of the force exerted by a gas above a liquid in a sealed container; a dynamic equilibrium exists between the vapor and the liquid
Term
vapor
Definition
describes the gaseous state of a substance that is generally a liquid or solid at room temperature
Term
boiling point
Definition
the temperature at which the vapor pressure of a liquid is just equal to the external pressure on the liquid
Term
normal boiling point
Definition
the boiling point of a liquid at a pressure of 101.3 kPa or 1 atm
Term
what determines the physical properties of liquids?
Definition
disruptive motions of particles and attractions among particles
Term
why do liquids have a definite volume?
Definition
the attraction between particles in liquids
Term
liquid particles are much closer together so...
Definition
liquids are more dense than gases
Term
do most water particles have enough kinetic energy to become gas?
Definition
no
Term
what does heat do to liquids
Definition
increases the kinetic energy of particles and some are able to escape the surface
Term
liquids evaporate into...
Definition
vapor/ gas
Term
gas/ vapors condense into...
Definition
liquids
Term
what is the equilibrium between of a liquid contained at a constant pressure
Definition
(evaporation)vapor and (condensed)liquid
Term
what rises when the temperature of a contained liquid rises?
Definition
vapor pressure
Term
vapor pressure indicates...
Definition
how volatile (or how easy it evaporates) a liquid is
Term
what is vapor pressure measured with?
Definition
a manometer
Term
what happens when the kinetic energy of liquid molecules heat up enough to vaporize?
Definition
the liquid boils
Term
what effects the boiling point of a liquid?
Definition
altitude( atmospheric pressure)
Term
does vapor have less stored energy than liquid?
Definition
no, it has more (so vapor burns are more severe than liquid burns)
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