P6 - Particles and Matter Flashcards
(15 cards)
What is specific latent heat?
- Energy needed to change the state of 1kg of the substance without changing the temperature
What is the equation for energy of hcange of state?
energy for change of state= mass * specific latent heat
What is specific latent heat of fusion?
Change of state from solid to liquid
What is specific latent heat of vaporisation?
Change of state from liquid to vapour
Why doesnt the temperature of the material change as it is changing state?
All energy goes into breaking or making bonds
What is the temp of gas related to?
The average kinetic energy of the molecules
What happens to the pressure when changing the temperature of a gas?
It changes when held at a constant volume
What happens to the speed of particles in a gas if temperature increases?
The speed of particles increases as gas is heated as kinetic energy increases
What happens to the pressure if the size of a container is reduced?
The pressure would increase as particles would hit the walls of the container more often
What is internal energy?
Total kinetic energy and potential energy of all the particles that make up a system
What is the equation for a fixed mass of gas held at a constant temperature?
pressure*volume =constant
What does doing work on a gas do to temperature and internal temperature?
It increases the internal energy and temperature of the gas
Solids - movement and arrangement(3)
- Particles are arranged in rows, touching
- Vibrate around a fixed pattern
- Forces of attraction between particles but dont have enough energy to overcome these
Liquids - movement and arrangement(4)
- Particles are randomly arranged
- Particles can move around each other
- More energy than solids and can overcome the forces of attraction - not completely
- No fixed shape - takes shape of container
Gases - movement and arrangement(3)
- Particles arranged randomly and far apart
- Sufficient energy to overcome forces of attraction completely
- Moving quickly in all directions
