Grade 11 - S1.1, S1.4, S1.5

elemtns or compounds

diff molecules mixed together not chemically bonded homogenous or heterogenous

same amount of protons and electrons

filtration, distillation,paper chromatography magnetism

cannot be broken doen by any chemical processes into a simpler substnace

more than one element combined chemically in a fixted mixture

more than one atom bonded together

pure element or compound

has mass and takes up space

theoretical concepts

comment on ratio of metals in alloy find the mass of each alloy and calculate grams or precent of each metal in the alloy

look to kinetic energy see on line how many particles have that amount of energy. curve that is further right and lower means higher temperature peak of curve represents kinetic energy that most particles are at

uniform composition - inter particle attraction of solvent must be similar to that of the solvent

non uniform mixture and propoerties are not same

particles closely packced strong inter particle forces fixed shape fixed volume

more spaced weaker inter particle forced no fixed shape no fixed volume

particles fully spread out inter particle forces are negligable no fixed shape no fixed volume

is the same for all molecules

particles with smaller mass diffuse more quickly at the same temp

solid to gas

gas to solid

temp when vapor pressure = external pressure

first line - vibrational energy of particles increases flat - melting point (energy added is to break inter moleuclar forces) second line - heating liquid flat - boiling point (all energy goes to breaking inter particle bonds) line - gas is futher heated under pressure

273.15