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Chemistry 30s > module 1 > Flashcards

module 1 Flashcards

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1
Q

how many major state of matter is there in the universe

A

4

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2
Q

what is matter

A

anything that takes up space(volume) and has a mass.

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3
Q

What is a property

A

characteristic that we can use to help us identify a person place, or things.

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4
Q

Name 2 type of property

A

Chemical

Physical

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5
Q

What is a chemical property

A

How substance react with other substances

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6
Q

What is a qualitative property

A

Base on descriptive information of of observation of physical characteristic

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7
Q

What is quantitative property

A

properties that are observed and can generally not be measured with a numerical result

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8
Q

Name some physical property

A

Density
Conpressability
Diffusion

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9
Q

What is density

A

The weight for its size

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10
Q

What is compressibility

A

Reduce the space between particle of a specific material

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11
Q

What is diffusion

A

The movement of one substance through an other

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12
Q

What are the common state of matter

A

Solid
Liquid
Gas
Plasma

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13
Q

What are the shape, volume, density, compressibility, diffusion of solid

A 
Define shape
Define volume
Usually very dence
Not easily compressed
Not easily diffused
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14
Q

What are the shape, volume, density, compressibility, diffusion of liquid

A 
Take the shape of its container
Defined volume
Usually less dence than solid
Not easily compressed
Easily diffused
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15
Q

What are the shape, volume, density, compressibility, diffusion of gas

A

Take the shape of its container
Take the volume of its container
Usually much less dence than solid and liquid

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16
Q

What is plasma

A

gaseous misture of positive ions and electrons.

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17
Q

What is the energy of an object in motion called

A

Kinetic energy

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18
Q

Why are gas easily compressible

A

The distance between the particle are much larger than the particle the self

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19
Q

What is intermolecular force

A

The force of attraction between particle

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20
Q

What happen the the speed of particle when temperature increases

A

The speed decreases

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21
Q

What hold 2 seperate particle together

A

Intermolecular force

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22
Q

What could elastic collision cause

A

Loss of energy
Particle have more energy
Energy of the particle stays the same

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23
Q

what does the kinetic molecular theory state when comes to collision between particles and between particles and their container?

A

its perfectly elastic, this means there is no loss of energy

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24
Q

what happen to the kinetic energy of particles when temperature increases

A

it increaes

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25
Q

what is the kinetic energy equation

A

1/2mv2

26
Q

what is viscosity

A

the measure of resistance of a liquid to flow

27
Q

what does it mean in reference to intermolecular forces when particles a re held together.

A

the intermolecular forces must be higher

28
Q

how are gases and plasma alike

A
  • state of matter
  • made of particles
  • particle are in constant motion
  • particles have large spaces between them
  • particles have very small forces of attraction
  • no definite shape, not definite volume, easily compressed and diffuse
29
Q

how are gases and plasma different

A
  • gases are atoms or molecule while plasma is made of positive ions and electrons
  • gases exist easily at room temperature while plasma required large amount of energy.
30
Q

what is a phase

A

refers to the mixture of states of matter that coexist as physically distinct part of a mixture

31
Q

what is endothermic phases change

A

those that require energy to be added to the system for the change to take place

32
Q

what is exothermic phase changes

A

are those in which more energy is released than is required to break bonds

33
Q

what is melting or fusion

A

solid will change to a liquid when heat is added or absorbed

34
Q

what is evaporation

A

conversion of a liquid to gas

35
Q

what is boiling

A

occurs when vaporization take place

36
Q

what is condensation or liquefaction

A

conversion of a gas to a liquid

37
Q

what is freezing or solidifiation

A

conversion of a liquid to solid.

38
Q

what happen during freezings or modification in term of energy

A

energy is released

39
Q

what is sublimation

A

it occurs when a solid changes directly to a gas without passing through the liquid state

40
Q

what is deposition

A

opposite of sublimation, conversion to a solid from gas

41
Q

what happen to energy as substance freezes

A

energy is loss

42
Q

what is it call when both solid and liquid are present

A

plateau

43
Q

what is happening when a plateau occurs in term of temperature on a graph

A

its the melting point

44
Q

what is the normal melting point

A

the temperature a substance melts or freezes at standard pressure

45
Q

what is a characteristic physical property

A

property that can be used to distinguish one substance from an another.

46
Q

what is evaporation

A

the conversion from liquid to gas

47
Q

when does eaporation occurs

A

when some particles on the surface of the liquid have enough energy to overcome the forces of attraction between the liquid particles.

48
Q

what does a particle need to evaporate from the remainder of the liquid

A

have enough energy

49
Q

what is evaporative cooling

A

the lowering of a substances temperature.

50
Q

what happen to the particles of the liquid and a substance boils

A

the particles absorb energy and begin to move faster and further apart

51
Q

what is call the dynamo equilibrium

A

when the rate of condensation and the rate of evaporation is equal

52
Q

what is fractional distillation

A

the product of separation by their differing boiling point

53
Q

why is water boiling at 100C

A

there is a special intermolecular force of attraction called hydrogen-bonding in the water

54
Q

what is present at the boiling point

A

both liquid and gas

55
Q

what causes a greater boiling point

A

a greater intermolecular forces.

56
Q

what is the unit of measure for pressure

A

KPA(kilopascal) or Milibar(meteorological)

57
Q

how is pressure define

A

force per unit area

58
Q

what is 1 atmosphere equal to in mmhm and KPA

A

760 mmhm and 101.325 KPA

59
Q

what is the pressure created b the vapour at equilibrium known as

A

vapour pressure

60
Q

when does boiling occurs

A

when atmospheric pressure and vapour pressure are equal

61
Q

what is interpolation

A

technique that allows us to predict values of the independent and dependant variables.

Chemistry 30s (5 decks)

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