P3: Particle Model Of Matter Flashcards
What is the specific heat capacity?
The energy required to Change 1kg of a substance by 1 degrees Celsius.
What is the specific latent heat?
The energy required to change 1kg of a substance from one state to another without changing the temperature
Internal energy:
Internal energy= chemical energy + kinetic energy
Properties of a solid(4):
- Particles have less internal energy than a liquid or gas. - They vibrate but DON’T move from their position.
- The particles are tightly packed.
- A solid has a fixed volume and shape.
Properties of a liquid(4):
- Particles of a liquid have more energy than solids but less than a gas.
- Particles move around each other.
- Particles are close together.
- A liquid has a fixed volume but NO fixed shape.
Properties of a gas(4):
- Gases have the most external energy out of all three states.
- The particles are widely spaced out.
- The particles move randomly and rapidly, colliding with each other.
- Gas particles fill the shape of the container.
When does a substance change state?
A substance changes state when energy is transferred to weaken the bonds between the particles of a substance.
Finding the volume of an irregular object:
- fill the displacement can with water
- measure the displaced water in the measuring cylinder
Define density.
The amount of particles in a set volume.
p=m/v
Gas pressure in a balloon:
When a balloon is being inflated the particles collide against the interior of the balloon, enlarging it.
As each gas molecule hits the side of a container it exerts a force, expanding or putting pressure on the walls of the container
What is the difference between specific latent heat of fusion and specific heat of vaporisation?(2):
- Fusion: solid to liquid or vice versa
- Vaporisation: liquid to gas or vice versa
sublimination:
from a solid to a gas
