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Physics > P3 Particles > Flashcards

P3 Particles Flashcards

1
Q

Why are solids the most dense?

A

They have a large number of particles in a set volume

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2
Q

How do you calculate density?

A

Mass/ volume (kg/m^3)

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3
Q

What RPA is used to calculate the density of irregular objects?

A

Eureka can experiment

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4
Q

What is 1ml equal to?

A

1 cm^3

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5
Q

What happens between melting and boiling?

A

Kinetic energy increases

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6
Q

What happens during melting?

A

Bonds are broken between molecules

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7
Q

Does temperature change during melting/ boiling?

A

No

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8
Q

What happens during condensing and freezing?

A

Potential energy decreases forming bonds

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9
Q

What is internal energy?

A

Kinetic energy + potential energy

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10
Q

What happens when an item is heated?

A

The internal energy increases

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11
Q

What happens when a substance is cooled?

A

The internal energy decreases

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12
Q

What is specific heat capacity?

A

The energy required to raise the temperature of one kilogram of a material by one degree Celsius

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13
Q

What does temperature change depend on?

A

Mass, specific heat capacity, the amount of of heat transferred

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14
Q

What is the standard unit for specific heat capacity?

A

J/kg degree C

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15
Q

What is the equation for energy change?

A

Mass x specific heat capacity x change in temperature

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16
Q

What is the equation that links power, energy and time?

A

Energy = power x time

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17
Q

What is the equation for specific latent heat of fusion (vaporisation)?

A

Specific latent heat = change in energy/ mass

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18
Q

What is used to overcome intermolecular forces of attraction?

A

Energy

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19
Q

What is the specific latent heat of fusion?

A

The energy required to convert 1kg of a substance from a solid to a liquid or from a liquid to a solid without a change in temperature.

20
Q

What is specific latent heat of vaporisation?

A

The energy required to convert 1kg of a substance from a liquid to a gas or a gas to a liquid without a change in temperature.

21
Q

What is the specific latent heat of vaporisation of water?

A

2,260,000J/kg

22
Q

What is the specific latent heat of fusion of water?

A

334,000J/kg

23
Q

What happens to pressure as volume decreases?

A

The pressure will increase as there are more collisions per second (a higher frequency of collisions) with the walls of the container. Faster and harder collisions.

24
Q

What is Boyle’s law?

A

The higher the pressure, the lower the volume

25
Q

What is the relationship between pressure and volume?

A

Pressure is inversely proportional to volume

26
Q

What happens when work is done on a gas?

A

Increases the internal energy of the gas and can cause an increase in temperature of the gas

27
Q

Absolute zero

A

The temperature at which the pressure of a gas drops to zero.

28
Q

Boiling point

A

Temperature at which a pure substance boils or condenses

29
Q

Changing of state

A

The changing of matter from one state to another e.g from a solid to a liquid

30
Q

Chemical changes

A

A change that results in the formation of new substances

31
Q

Density

A

Mass per volume of a substance

32
Q

Freezing point

A

The temperature at which a pure substance freezes

33
Q

Gas pressure

A

The force on a surface caused by the collisions of gas particles with the surface. Gas pressure acts at right angles to a surface

34
Q

Internal energy

A

The energy of the particles of a substance due to their individual motion and positions

35
Q

kelvin

A

One kelvin is the same temperature interval as 1 degree Celsius

36
Q

kelvin temperature scale

A

A temperature scale that measures temperatures relative to absolute zero

37
Q

Kinetic theory

A

A model that explains the properties of different states of matter in terms of the movement of particles.

38
Q

Latent heat

A

The energy transferred to or from a substance when it changes state

39
Q

Melting point

A

Temperature at which a pure substance melts of freezes

40
Q

Pascal

A

Unit of pressure

41
Q

Physical change

A

A change in which no new substances are produced

42
Q

Specific heat capacity

A

The energy required to raise the temperature of 1kg of a substance by 1 degree C

43
Q

States of matter

A

Solid, liquid or gas

44
Q

Temperature

A

A measure of how hot something is

45
Q

Sublimation

A

When a solid turns directly into a gas without becoming a liquid first

Physics (17 decks)

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