Particle Model-Paper 1
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What are the properties of gas
Easy to compress Can flow Low density
What is the arrangement and motion of particles in a gas
Very weak forces of attraction High kinetic energy Free to move Far apart
Properties of a liquid
Can flow Density similar to solid Can’t be compressed
What is the arrangement and motion of particles in a liquid
Less kinetic energy than in a gas but more in a solid Can slide past each other
Properties of a solid
Can’t be compressed Can’t flow High density
Arrangement and motion of particles in a solid
Low kinetic energy Vibrate in their fixed position Strong forces of attraction
What is internal energy
Energy which is stored by the particles in a system Total kinetic energy and potential energy of all the particles
What is temp
Is a measure of the average kinetic energy of the particles
How heating affects the internal energy of a system
Heating causes internal energy to increase
What is latent heat of fusion
The energy needed to change the state of 1kg of a substance from solid to liquid without increasing its temp
What is latent heat of vaporisation
The energy needed to change the state of 1kg of a substance from liquid to Vapour without increasing its temp
How to find the density of a liquid
Measure mass of liquid Find volume of liquid Density=mass/volume
Describe a method to find find a density of a regular object
Record mass Measure length width and height calculate volume Density=mass/volume
Method to find the density of an irregular object
Record mass Fill eureka can with water Use measuring cylinder to collect the displaced water Density=mass/volume
What’s the relationship between temp and gas pressure at a constant volume
As temp increases Pressure increases
Explain the relationship between volume and gas pressure at a constant temperature
As volume increases pressure decreases
Describe how doing work on a gas affects the internal energy
Work is the transfer of energy by a force Doing work on a gas increases the internal energy of a gas and can cause an increase in the temperature of gas