catalyst a substance which speeds up the rate of a reaction while not being consumed homogeneous...

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Catalyst A substance which speeds up the rate of a reaction while not being consumed Homogeneous Catalysis - a catalyst which is in the same phase as the reactants Heterogeneous Catalysis- a catalyst which is in the different phase as the reactants catalytic converter • solid catalyst working on gaseous materials

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Page 1: Catalyst A substance which speeds up the rate of a reaction while not being consumed Homogeneous Catalysis - a catalyst which is in the same phase as the

Catalyst

A substance which speeds up the rate of a

reaction while not being consumed

Homogeneous Catalysis - a catalyst which is in

the same phase as the reactants

Heterogeneous Catalysis- a catalyst which is

in the different phase as the reactants

catalytic converter• solid catalyst working on gaseous materials

Page 2: Catalyst A substance which speeds up the rate of a reaction while not being consumed Homogeneous Catalysis - a catalyst which is in the same phase as the

Conversion of NO to N2 + O2

Page 3: Catalyst A substance which speeds up the rate of a reaction while not being consumed Homogeneous Catalysis - a catalyst which is in the same phase as the

Catalytic Converter catalyst

H2O(g) + HCs CO(g) + H2(g) (unbalanced)

catalyst

2 H2(g) + 2 NO(g) N2(g) + 2 H2O(g)

catalyst

HCs + O2(g) CO2(g) + H2O(g) (unbalanced)

catalyst

CO(g) + O2(g) CO2(g) (unbalanced)

catalyst = Pt-NiOHCs = unburned hydrocarbons

Page 4: Catalyst A substance which speeds up the rate of a reaction while not being consumed Homogeneous Catalysis - a catalyst which is in the same phase as the

Enzymes: Biological catalystsBiological catalysts

Typically are very large proteins.

Permit reactions to ‘go’ at conditions that the body

can tolerate.

Can process millions of molecules every second.

Are very specific - react with one or only a few types

of molecules (substrates).

Page 5: Catalyst A substance which speeds up the rate of a reaction while not being consumed Homogeneous Catalysis - a catalyst which is in the same phase as the

The active site

Enzymes are typically HUGE proteins, yet only a

small part is actually involved in the reaction. The active site has two

basic components.

catalytic site

binding site

Model of

trios-phosphate-isomerase

Model of

trios-phosphate-isomerase

Page 6: Catalyst A substance which speeds up the rate of a reaction while not being consumed Homogeneous Catalysis - a catalyst which is in the same phase as the

Page 7: Catalyst A substance which speeds up the rate of a reaction while not being consumed Homogeneous Catalysis - a catalyst which is in the same phase as the

Maximum Velocity for an Enzyme Catalyzed Reaction

Page 8: Catalyst A substance which speeds up the rate of a reaction while not being consumed Homogeneous Catalysis - a catalyst which is in the same phase as the

Enzyme Activity Destroyed by Heat

2008 05-08 - FDR · methanol in the presence of a catalyst (KOH, potassium hydroxide). The optimal catalyst concentration was 1% KOH, which is only one type of catalyst. Other common

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Catalyst Balkans Home - Catalyst Balkans

ENZYMES. Enzymes speed up metabolic reactions by lowering energy barriers A catalyst is a chemical agent that speeds up a reaction without being consumed

ENZYMES A catalyst –Is a chemical agent that speeds up a reaction without being consumed by the reaction –An enzyme is an organic catalyst Enzymes are

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Chemistry...(D) Catalyst participates in the reaction, but not consumed in the process (E) Use of catalyst cannot change the order of the reaction Solution: (E) The catalyst (i) If

Enzymes. Enzyme: a macromolecule (usually a protein) that acts as a catalyst; a chemical agent that speeds up a reaction without being consumed (used

Catalysis October 2015. Catalyst A substance that speeds up a reaction without being consumed itself How? By providing a new pathway for the reaction,

NOTES: CHEMICAL REACTIONS · 2014-02-26 · (aq) aqueous – only works when dissolved in water Catalyst a substance that speeds up a reaction but is not itself consumed; provides

A catalyst Is a chemical agent that speeds up a reaction without being consumed by the reaction An enzyme is an organic catalyst Enzymes are proteins

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chemistry.mdma.chchemistry.mdma.ch/hiveboard/rhodium/pdf/benzyl-oh.cat...over Raney nickel catalyst in any reaction conditions, "reduced nickel" was used as nickel catalyst which

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