Types Of Matter Flashcards
what does the strength of intermolecular forces depend on
temperature
pressure
the material ( type of bond and structure)
why do solids expand slightly when heated
the particles vibrate more
why do liquids expand slightly when heated
the particles move faster
what is the motion of gas particles as they move
travel in straight lines until they collide
explain 3 limitations of particle theory
particles are not solid, inelastic or spheres like the model shows
model doesn’t show forces between particles
size of particles and distance between them are not shown
what is a bulk property
properties that stay the same regardless on the amount of atoms are in the sample for example density and melting point.
they depend on the interaction of particles so a single atom would behave differently
explain melting
particles gain energy so vibrate more which weakens intermolecular forces. when temperature reaches melting point the particles have enough energy to break free from their positions
explain boiling
heated and particles gain more energy so they more faster which weakens attractive forces. at boiling point the particles have enough energy to overcome the forces between hem
explain freezing
liquid cools, particles have less energy so move around less so not enough energy to overcome attraction between particles so particles are less free to move
what is one micrometre in meters
1 x 10^-6
what is one nanometre in meters
1 x 10^-9
how big are coarse particles
2500nm - 10000nm
how big are fine particles
100nm - 2500nm
how big are nanoparticles
1nm - 100nm
what is the diameter of a typical atom
0.1nm
