1. a - States of matter Flashcards

1
Q

describe a solid in terms of

arrangement

A

strong forces of attraction
close together
fixed position
regular lattice arrangement

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2
Q

describe a solid in terms of

movement

A

don’t move

keep a definite shape and volume

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3
Q

describe a solid in terms of

energy of particles

A

vibrate about their positions

hotter = vibrate more ( solids expand slightly when heated )

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4
Q

describe a liquid in terms of

arrangement

A

weak force of attraction
randomly arranged
free to move past each
stick closely together

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5
Q

describe a liquid in terms of

movement

A

free to move past each other
definite volume
don’t keep a definite shape

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6
Q

describe a liquid in terms of

energy of particles

A

constantly moving
random motion

hotter = move faster ( liquids expand slightly when heated )

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7
Q

describe a gas in terms of

arrangement

A

very weak force of attraction
free to move
far apart
gas particles travel in straight lines

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8
Q

describe a gas in terms of

movement

A

don’t keep a definite shape
don’t keep a definite volume
fill any container

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9
Q

describe a gas in terms of

energy of particles

A

move constantly
random motion
hotter= move faster ( expand or pressure increases when heated )

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10
Q

name of process of solid to liquid

+ explain changes

A

melting

particles enough energy to break free from positions

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11
Q

name of process of liquid to solid

A

freezing

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12
Q

name of process of liquid to gas

+ explain changes

A

evaporating

particle enough energy to break their bonds

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13
Q

name of process of gas to liquid

A

condensing

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14
Q

name of process of solid to gas + gas to solid

A

subliming

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15
Q

definition of dilution

A

??? process of reducing the concentration of a solute in solution simply by mixing with more solvent

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16
Q

example experiment of dilution

A

potassium manganite and water

17
Q

definition of diffusion

A

movement of particles from a high concentration to a lower concentration

natural tendency of stuff to spread out

18
Q

example experiment of diffusion

A

ammonia and hydrogen chloride

19
Q

in an ammonia and hydrogen chloride diffusion experiment why does the white ring form nearer to the end with the hydrochloric acid

A

particles of ammonia are smaller and lighter than the particles of hydrogen chloride = diffuse through air more quickly

20
Q

definition of solvent

A

dissolves the solute
substance that does the dissolving

eg. water

21
Q

definition of solute

A

substance being dissolved

22
Q

definition of solution

A

mixture of solute and solvent that does not separate out

23
Q

definition of saturated solution

A

solution where max amount of solute has been dissolved = no more solute will dissolve in solution

24
Q

definition of solubility

A

the ability of a substance to dissolve in a solvent

25
Q

PAPER 2

what is solubility measured in

A

grams of solute per 100 grams of solvent

26
Q

PAPER 2

example of how the units of solubility works ( units = grams per 100g of solvent )

A

if 23 grams of substance can dissolve in 100g of water before the solution becomes saturated

substance solubility = 23g per 100g of water

27
Q

PAPER 2

equation for solubility

A

[ mass of solid ( g ) / mass of water removed ( g) ] x 100