revision 2 Flashcards
latent heat
energy needed for a substance to change
enthalpy of heat
energy needed to convert one mole of sold to liquid at melting point
enthalpy of vaporisation
energy needed for one mole of liquid to gas at boiling point
colbalt chloride
blue when dry, pink with h2o
copper sulphate
white when dry, blue with water
reactivity series
K
Na
Ca
Mg
Al
C
Zn
Fe
Sn
Pb
H
Cu
Ag
Au
Pt
anyhydrous salts
tell you when water is present
average atomic mass for isotopes
atomic mass x % + how many there are/ 100
positively charged ions
cations
negative charged ion
anions
mole formula
mass= mr x moles
calculating energy change (entalphy diagrams)
broken bonds- bonds made
(negative shows a endothermic)
electrolysis
using electricity to split water to h and o
rate of reaction formula
products formed (g/cm^3)/time taken (s)
oxidation
loss of electrons, becomes positive, charge decreases