Random Flashcards
Triple bond
1 sigma and 2 Pi bonds
Polar covalent?
> 0.4
Ionic
> 1.7
To go from cm3 to m3 in gas laws multiply by
1 × 10-6 cubic metre
Primary standard
Can be dissolved to make up a solution of known concentration and is stable and pure
Bond energy
average energy required to break a bond and
to separate the atom
Atomic radius
half internuclear distance in a single homonuclear bond
Give one property affected by presence of intermolecular hydrogen bonding
Melting point, boiling point
Describe oil refining
Hot crude oil is introduced at base of column, heated, vapour travels through trays, fractions Come off through outlets depending on their boiling points
Cooling always shifts
Exothermic
Isotopes
Atoms of same elements with different mass numbers
Metabolite in liver
Ethanal
Radio isotope
Radioactive form of element
BOD
Oxygen consumed when sample is kept in the dark for 5 days at 20 degrees
Heat of combustion
When one mile of a substance is burned completely in oxygen
Apparatus to measure heats of combustion
Bomb calorimeter
De-ioniser
Replace positive ions with H+ ions
Replace negative ions with OH- ions
What makes nitrogen chemically inert
High energy bond
Non polar
Fixation of nitrogen
Conversion of nitrogen to useful compounds
Heat of reaction
Number of moles of reactants in the equation react
Isomerisation
Changing to different structures that have the same molecular formula
Gay lussacs law
The volumes of reacting gases are in whole number ratio
