Le Chatelier's

Front 1

increasing temp

Back 1

position of eqm shifts to favour the endothermic rtn.bc energy is absorbed.so yield increases.

Front 2

{1}increasing pressure
{2}increasing conc

Back 2

{1} position of eqm shifts to side with fewer molecules/particles so yield decreases.
{2} position of eqm shifts to other side to decrease the conc.so yield increases.

Front 3

{1} powder
{2} catalyst

Back 3

{1} increases S.A for adsorption of reactants so more frequent successful collisions.
{2} creates an alternative pathway tht has a lower activation enthalpy.

Front 4

{1}formation of H bonds
{2} formatn of id-id bonds.

Back 4

{1}the lone pair on oxygen(or N or F) is small and electronegative.its attracted to the H which is partially +ve or attracted to the H polarised in OH bond.
{2} electron mov'ts in molecules cause an uneven distribution of charge.a dipole is induced in a neighbouring molecule leading to attraction.

Front 5

how and why the rate of a rtn varies under different temperatures

Back 5

it increases as temp increases.
bc particles gain more Ek and move faster thus colliding more frequently ans successfully.(more collisions have total energy of atleast the Ea)