chemical reactions 1

what are the 3 states of matter

gas solid and liqid

what substances can occour in these three states

pure substances, elements and compounds

describe the relationship between going from a solid to a liquid then a liquid to a gas

the same amount of energy is required for both transitions

what are the 2 types of van der waals forces

london and dipole dipole interactions

describe london forces

weak intermolecular interaction between non polar molecules cause by tempory diffrences in the binding of electrons - weakes of inetmolecular forces

what is the attraction dependant on in london forces

contact area

when do dipole dipole interactions occour

when there are 2 permenant dipoles that interact - opposite partial charges attract

what does a hydrogen bond require

oxeygen or nitrogen in organic molecules

describe the structure of water

less dense when a solid, solid water floats on liquid water

state some properties of water

it has a very high boiling point and occours predominantly as a liquid