Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Phys > Chapter 6- Matter > Flashcards

Chapter 6- Matter Flashcards

1
Q

what is density?

A

how tightly packed the matter is in a given space

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

density equation

A

density= mass/volume p=m/v

density (Kg/M^3, g/cm^3)
mass(Kg)
volume= cm^3, m^3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the law of displacement?

A 
Law of Displacement
-an object completely submerged in
a fluid (like water) will replace an
amount of fluid equal to its
own volume
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what happens to mass when the state changes(conservation of mass)

A

stays the same because the number of particles is the same

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what is specific heat capacity?

A

energy required to increase 1 kg of a substance by 1 degrees Celsius

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

what is specific latent heat?

A

the amount of energy required to change the state of 1kg of a substance at a constant temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

latent heat equation

A

energy=mass x specific latent heat

SLH = J/k
Mass = Kg
Energy = J
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what is latent heat /

A

the energy transferred to a substance without the substances temperature rising

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is density?

A

The amount of mass in a fixed volume how tightly compacted matter is

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Density equation

A

P=m/v

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Units for density

A

g/cm^3
Kg/m^3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why do objects float

A

Because they have a low mass of matter in a volume this means they have a low mass of matter in a volume so this means they have a less density than the liquid, this means the object floats in addition an up thrust force causes this

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is sublimation?

A

Solid to gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is deposition?

A

Gas to solid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is freezing ?

A

Liquid to solid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is evaporation?

A

Liquid to gas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is melting?

A

Solid to liquid

18
Q

What is condensation ?

A

Gas to liquid

19
Q

Solids characteristics

A

Particles vibrate aroun a fixed point, with little energy , particles re regularly arranged and are tightly compacted , strong bond of attraction

20
Q

Liquid characteristics

A

Particles are close, the particles move round each other , they are randomly arranged and have greater energy than solids
Small forces of attraction

21
Q

Gases characteristics

A

Particles are far apart
Particles are randomly arranged
Particles move quickly in all directions
High energy
No forces of attraction / weak forces of attraction

22
Q

Required Practical 5. Density of regular and irregular solid

A
  1. Firstly measure the mass of regular solid
    using a balance
  2. Note the mass in a table
  3. using vernier calipers measure the length, width and
    height of the object
  4. multiply the length width and height to
    calculate the volume of the object
    5-now calculate the volume of the object us, the
    equation density- mass ÷ volume.
  5. Repent steps 1-5 3 more times and calculate
    a mean
  6. Now measure the mass of an irregular solid
    using a balance. Record the mass
  7. To calculate to value, fill an Eureka (displacement) with water until the water is level( use a measuring cylinder(not that relevant)
    with the spout.
  8. Place a measuring cylinder below the spout
  9. Lower the irregular solid into the Eureka (displacement) can slowly
  10. The water displaced into the measuring cylinder is the volume of the solid
  11. measure (read) the value of water displaced and note this down
  12. Use the volume and mass to calculate
    the density using density= mass/volume
  13. Repeat 3 more times at calculate a mean
  14. write a conclusion
23
Q

What is the conservation of mass?

A

When a substance changes state its mass is the same as the number of particles is the same

24
Q

Mini practical- Finding the melting point of stearic acid

A

Place solid stearic acid in a boiling tube with a thermometer inside(the acid)
Record staring temperature using a thermometer
Place test tube in a beaker contains water(water bath)
Heat with a Bunsen Bruner , start a stop clock and measure the tempearture using the thermometer every minute
Remove from hot water once all the acid melts, record the final temapetaturE this is the melting point
Repeat 3 more times and calculate a mean
(To work out melting point)
Plot a graph with the results

25
Q

How would you calculate the density of a liquid

A

Place a measuring cylinder on a balance tear the balance fill the measuring cylinder with the liquid, not the mass of the liquid, note the volume of the liquid , use the equation mass +density/volume to calculate the density

26
Q

What is internal energy?

A

The total energy that a systems particles have in its potential and kinetic energy stores

27
Q

How does increasing the temperature of a system/substance increases the internal energy

A

More work is done , the energy causes the particles to move and increases the kinetic energy

28
Q

How does the energ in a substance relating to internal energy have relationship

A

The potential energy that they hav in their individual positions are relative to eachother
When

When hay’s all state of a substance changes so does the energy of the particles

29
Q

What is specific latent heat?

A

Te amount of energy require to change 1kg f a substance from one state to another without changing its temperature

Can be either fusion(s to l or l to s) or vaporisation (l to g or g to l)

30
Q

What does latent mean?

A

Hidden

31
Q

What is latent heat

A

It is hidden heat it refers to changing state of a substance without raising it’s temperature

32
Q

What happens to energy and internal energy when a substance is melting or boiling?

A

Energy is till put in but it’s internal energy is increasing , but the energy used to break bonds rather than raising the temperature

33
Q

What happens to energy and internal energy when a substance is freezing or condensing

A

Bonds are formed between particles with relative energy . This mean the internal energy decreases , but the temp doesn’t go down until all th substance has turned to liquid(condensing) ir a solid

34
Q

Specific latent heat equation

A

E=lm

L is lattent heat units for this are J/kg
M is mass
E is energy

35
Q

How is kinetic energy related to temp (in gas)

A

The avg energy in ek stores is related to temp, higher them higher ek in a systems store

36
Q

What is a system?

A

object or group of objects.

37
Q

If temp increases how does it affect motion in gases

A

If temp increase this increases energy in kinetic energy stores which mans the particles move faster

Side note

If this is in a closed system Thi will increase prsssure as there i more frequent collisions of particles per an area

38
Q

Why does a balloon push out as it rises in the atmosphere?

A

The atmospheric pressure outside the balooon is lower than the pressure inside the ballon as the balloon goes up this mans the pressure is cgreater on the inside than the outised spa ding the balooon , this it the same for a marshmallow

39
Q

How is pressure created in gases

A

Through collisions of gas ateiclea with a surface

If the temp is constant and volume is increased the pressure decreases , in a eagled container th pressure is always the total force exerted by all gas particle on a unit o are of the container walls

If work is done it will increase pressure as this energy is transferred to ek stores increasing speed due to 1/2 x mas. X velocity^2. Which means there are more collision over a unit of area increasing the pressure

40
Q

Pressure volume constant

A

Pressure and volume are in an inversely proportional relationship

Pv= constant

If volume increases pressure decreases

But the constant stays the same value

For example

Pressure = 100 pa

The volume decreases to 0.3cm^3 from 1.5 cm^3

The temp and mass stay the same what is the pressure
I
What is the pressure

100 x 1.5= 150

So p x 0.3= 150

P= 150/0.3

P= 500 pa

Phys (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions