The Particle Model P1T3

Question 1

What is the kinetic theory?

Answer 1

1. Everything is made of particles
2. These particles are free to move

Question 2

What is the word equation for density?

Answer 2

Density = mass/volume

Question 3

What is mass measured in?

Answer 3

Kg

Question 4

What is volume measured in?

Answer 4

m*3

Question 5

What is density measured in?

Answer 5

Kg/m*3

Question 6

What is internal energy?

Answer 6

Internal energy is the total kinetic energy and potential energy of all particles that make up a system.

Question 7

What happens to internal energy if temperature increases?

Answer 7

Internal energy increases

Question 8

What happens to internal energy if pressure increases?

Answer 8

Internal energy increases

Question 9

What happens to the mass of a substance if it changes state?

Answer 9

The mass is conserved

Question 10

What happens to the temperature as a substance changes state?

Answer 10

The temperature remains constant as the energy is going into breaking bonds.

Question 11

What happens when a substance changes state from liquid - gas compared to solid - liquid?

Answer 11

There is more energy required as the bonds are broken completely

Question 12

What is specific heat capacity?

Answer 12

The energy required to increase the temperature of 1kg of a substance by 1°C

Question 13

What does ‘specific’ mean, in physics terms?

Answer 13

Per kilogram

Question 14

What is specific heat capacity measured in?

Answer 14

J/Kg°C

Question 15

What is the word equation for specific heat capacity?

Answer 15

Energy = mass x specific heat capacity x temperature change

Question 16

List the method for the specific heat capacity required practical.

Answer 16

1. Place the immersion heater until the metal block
2. Place the thermometer and place oil around it to make sure it is surrounded by hot material
3. Fully insulate the block
4. Record the temperature of the block
5. Connect the heater to the power supply
6. Turn it off after 10 minutes (the temperature will still be rising, but will eventually begin to cool)
7. Record the highest temperature during the experiment

Question 17

What is the independent variable for the specific heat capacity practical?

Answer 17

The temperature and power of the heater

Question 18

What is the dependent variable for the specific heat capacity practical?

Answer 18

The highest temperature that the block reaches

Question 19

Name three control variables for the specific heat capacity practical.

Answer 19

Heat loss, the type of insulator, the type of heater

Question 20

Name a risk for the specific heat capacity required practical.

Answer 20

Burns - be careful around the heater and making sure it doesn’t reach unsafe levels

Question 21

What is specific latent heat?

Answer 21

The energy required to change 1Kg of a substance into a new state.

Question 22

What is specific latent heat of fusion?

Answer 22

The energy required to change 1Kg of a solid to a liquid.

Question 23

What is specific latent heat of vaporisation?

Answer 23

The energy required to change 1Kg of a liquid into a gas.

Question 24

What is Boyles Law?

Answer 24

Internal energy is the energy stored inside the system by the particles that make up the system. This is the total kinetic energy of the particles in the system

Question 25

What is the equation for ‘Boyles law’?

Answer 25

p x V = constant

Question 26

What does Boyles law only apply to?

Answer 26

When it is at a constant temperature

Question 27

What is Brownian motion?

Answer 27

That gas particles move in constant random motion.

Question 28

What is gas pressure caused by?

Answer 28

Gas particles colliding with the surface of the container

Question 29

What is the word equation for pressure?

Answer 29

Pressure = force / surface area

Question 30

What is velocity?

Answer 30

The velocity of an object is it’s speed in a specific direction