exam 4 (catalysts)

what do catalysts do

they lower the transition state energy

do they change the energies of reactants or products

no they dont

do they alter the mechanism

they can

do catalysts get consumed in the reaction

they dont get consumed you can get the catalyst back after the reaction

heterogenous catalysts

catalysts and reactants are in different phases

easy catalysts recovery

not very efficent

homogeneous catalysts

in the same phases, (solid, liquid, gas)

more efficient

not good catalysts recovery

examples of catalysts

nickle catalysts, cfcs, catalyst converters, enzymes

what do nickle catalysts do

they are in hydrogenation, convert cis fat into trans fat

add h2 into c double bond

what do cfcs do

this is a bad example of catalysts

used in old fridges, they drift up into atmosphere uv light breaks off cl and this catalyzes the destruction of ozone

catalyst converter

this is in cars, turns harmful emissions into less toxic substances

enzymes

they are proteins that catalyze life

what catalysts do catalyts convertors use

pt, rs, pd

what is immobilization

attatch catalyts to textile

now it becomes easy to seperate, basically recyclable

homo—> hetero

what is hydrolysis and what fabrics

break down textile with basically water splitting

used with cotton and polyester

hydrolysis with polyester

it uses a base

hydrolysis with cotton

uses enzyme

how are they similar

they both use water to break up polymers and regenerate monomers