1 Particles + Mixtures Flashcards
What is a solid?
Strong forces of attraction,
lattice arrangement.
Vibrate about fixed positions.
Do solids move/flow?
No they have fixed shape and volume.
What is a liquid?
Weaker forces of attraction (but still pretty strong)
Free to move around set point
Constant movement in random motion
Do liquids move/flow?
Definite volume not definite shapes - will flow at bottom of container.
What is a gas?
Very Weak forces No arrangement (particles far apart) Constantly moving in random motion.
Do gases move/flow?
No constant shape or volume- always fill container.
Liquid -> Gas
Evaporation
Solid -> Gas
Subliming
Solid -> Liquid
Melting
Liquid -> Solid
Freezing.
Gas -> Liquid
Condensation.
What can be done instead of evaporation?
Boiling.
What is diffusion?
Gradual movement of particles from places where there are lots, to places where there are few.
(Basically just particles spreading out)
What colour is bromine gas?
Orange/brown
Describe Bromine?
Strong smelling.
A student fills a glass jar with bromine gas (bottom of glass), and the other with air (top of glass). Separated with a glass plate. They then remove the plate.
What happens?
Bromine diffuses up.