Physics chapter 6

• Created by: abiiwelsh
• Created on: 24-06-18 11:56
What is density?
Mass of substance per volume- Kg/m^3
1 of 26
What is the formula for density?
Density = mass / volume
2 of 26
How to measure volume of irregular solid?
Lower object on thread into measuring cylinder filled with water- change in rise in water is the volume of object
3 of 26
What is a physical change?
Change in state- reversible, no new substances
4 of 26
What is the process of liquid into solid?
Freezing/ solidifying
5 of 26
What is the process of liquid into gas?
Boiling or vaporisation
6 of 26
What is the process of solid into gas?
Sublimation
7 of 26
What is the process of gas into solid or liquid?
Condensation
8 of 26
Which state of matter particles has the most kinetic energy?
Gas particles
9 of 26
What happens at the melting and boiling points to the temperature?
The temperature stays the same until all bonds are broken or formed
10 of 26
What affects melting and boiling points?
Impurities in substance- add salt to water- melting point lowered
11 of 26
What is latent heat?
Energy transferred to substance when it changes state
12 of 26
What is internal energy?
The energy of particles in substance
13 of 26
What is internal energy the sum of?
Kinetic energy of particle due to individual motion and potential energy of particle due to individual position
14 of 26
What does internal energy not include?
Gravitational potential energy and kinetic energy caused by motion of whole substance
15 of 26
What is latent heat of fusion?
Energy needed for particles to break away from each other
16 of 26
What happens to latent heat energy when a liquid becomes a solid?
It is transferred to surroundings
17 of 26
What is the specific latent heat of fusion?
Energy needed to change 1kg of substance from solid to liquid at its melting point
18 of 26
What is the unit of specific latent heat of fusion/ vaporistation?
Joule per kilogram (J/Kg)
19 of 26
What is the formula for specific latent heat fusion and vaporisation?
SLHoF or SLHoV= energy / mass
20 of 26
What is specific latent heat of vaporisation?
Energy needed to change state of 1kg of substanc from liquid to gas at its boiling point
21 of 26
How can you see the effect of molecules in the air?
Smoke particles in glass chamber, light shone through, observe through microscope- see molecules changing path- changin path due to air molecule collision
22 of 26
Why do smoke particle move in random motion in air?
Air molecules collide with smoke particles- push it and change direction
23 of 26
What does the volume of a gas depend on?
Pressure of gas and temperature- gas can be compressed because pressure increases
24 of 26
What would happen to gas in tube if piston compressed it very quickly?
Increase internal energy store and temperature- energy transferred to to gas is more than energy it can give to surroundings.
25 of 26
What is boyles law?
For fixed mass of gas at constant temperature the pressure x volume = constant- volume and pressure are inversely proportional
26 of 26

Other cards in this set

Card 2

Front

What is the formula for density?

Back

Density = mass / volume

Card 3

Front

How to measure volume of irregular solid?

Card 4

Front

What is a physical change?

Card 5

Front

What is the process of liquid into solid?