Matter: States of Matter

(Liquid)

Matter: States of Matter

(Liquid)

• Indefinite shape– Take the shape of the container – Particles are in close contact with

each other, but the arrangement isn’t rigid or orderly --> flow

• Definite volume• Almost incompressible

Liquids

Liquids

• Vaporization- conversion of a liquid to a gas or vapor

• Evaporation - when this occurs at the surface of a liquid that is not boiling

• Boiling Point– A liquid boils at a temperature at

which its vapor pressure is equal to the pressure of the gas above it.

– The lower the pressure of a gas above a liquid, the lower the temperature at which the liquid will boil

Liquids

• Boiling point– As a liquid is heated, its vapor

pressure increases until the vapor pressure equals the pressure of the gas above it.

– Bubbles of vaporized liquid (i.e., gas) form within the bulk liquid and then rise to the surface where they burst and release the gas. (At the boiling temperature the vapor inside a bubble has enough pressure to keep the bubble from collapsing.) http://www.chem.purdue.edu/gchelp/liquids/boil.h

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Liquids

Interesting to Note…• Normal bp of water = 100 oC

–Denver = bp of water is 95 oC, since Denver is 1600 m above sea level and average atmospheric pressure is about 85.3 kPa

Liquids

• Viscosity –Resistance to flow

• Rank the following from least viscous to most viscous.

• Molasses• Water• Motor oil

Liquids