HW 11 3 REACTION PROFILE DIAGRAMS ENERGY Key

Key Features: Y-axis = ENERGY X-axis = Reaction Progress (similar to time) Reactants start

1 A AND 1 B) EXOTHERMIC RXN PRODUCTS ARE LOWER IN E THAN REACTANTS;

ENERGY (k. J/mol) RXN PROGRESS A) Ea = +10 k. J/mol ∆E = -10

ENERGY (k. J/mol) RXN PROGRESS A) Ea = +30 k. J/mol ∆E = +10

ENERGY (k. J/mol) RXN PROGRESS A) Ea = +25 k. J/mol ∆E = -30

LINK TO NI 3 Reaction ENERGY (k. J/mol) RXN PROGRESS

Decomposition of NI 3: ENERGY (k. J/mol) Small Ea (Touch of a feather sets

HW 11 -3 CATALYSTS #5) A catalyst is a substance that SPEEDS UP the

TIME- LAPSE OF Co. Cl 2 CATALYZED 11 -3, RXN OF TARTRATE AND H

11 -3, #7 CATALYST IN OZONE DECOMPOSITION RXN Cl is the catalyst; It speeds

Higher % successfully jumped lower height barrier 1 1/5 x 100 = 20% 4

HW 11 -3, #9: CATALYSTS ACCELERATE REACTIONS WITHOUT BEING CONSUMED BY LOWERING THE ENERGY

HW 11 -3, #10 A – WHAT IS AN ENZYME? A) Enzymes are biological

HW 11 -3, #10 B – WHY ARE ENZYMES IMPORTANT? B) Enzymes control the

PICTURE OF ENZYME CATALYST Active site Enzyme link HW 11 -3, #10

ENZYME ACTIVE SITE WILL ONLY ACCEPT SPECIFIC SUBSTRATES REACTANTS WITH CORRECT SIZE AND SHAPE

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HW 11 -3 REACTION PROFILE DIAGRAMS ENERGY

Key Features: Y-axis = ENERGY X-axis = Reaction Progress (similar to time) Reactants start at 0 energy. TS = HIGHEST energy point at the TOP of the activation barrier. Old bonds being BROKEN new bond being FORMED. ΔE = energy PRODUCTS – REACTANTS; Ea = Δ between R and TS

1 A AND 1 B) EXOTHERMIC RXN PRODUCTS ARE LOWER IN E THAN REACTANTS; ENDOTHERMIC REACTANTS ARE LOWER IN E THAN PRODUCTS

ENERGY (k. J/mol) RXN PROGRESS A) Ea = +10 k. J/mol ∆E = -10 k. J/mol

ENERGY (k. J/mol) RXN PROGRESS A) Ea = +30 k. J/mol ∆E = +10 k. J/mol

ENERGY (k. J/mol) RXN PROGRESS A) Ea = +25 k. J/mol ∆E = -30 k. J/mol

LINK TO NI 3 Reaction ENERGY (k. J/mol) RXN PROGRESS

Decomposition of NI 3: ENERGY (k. J/mol) Small Ea (Touch of a feather sets off reaction Large ∆E (Large amount of E released) RXN PROGRESS

HW 11 -3 CATALYSTS #5) A catalyst is a substance that SPEEDS UP the rate of a chemical reaction without itself BEING CONSUMED IN THE RXN.

TIME- LAPSE OF Co. Cl 2 CATALYZED 11 -3, RXN OF TARTRATE AND H 2 O 2 HW Part 6, # REACTION DOES NOT OCCUR AT OBSERVABLE RATE WITHOUT CATALYST Initial Final During Link #6 Catalyst

TIME- LAPSE OF Co. Cl 2 CATALYZED 11 -3, RXN OF TARTRATE AND H 2 O 2 HW Part 6, # Link #6 Catalyst Initial During Final Catalyst (Co. Cl 2) accelerates the rate of reaction without itself being consumed in the reaction

11 -3, #7 CATALYST IN OZONE DECOMPOSITION RXN Cl is the catalyst; It speeds up the breakdown of ozone, but is not used up in the reaction.

Higher % successfully jumped lower height barrier 1 1/5 x 100 = 20% 4 4/5 x 100 = 80%

HW 11 -3, #9: CATALYSTS ACCELERATE REACTIONS WITHOUT BEING CONSUMED BY LOWERING THE ENERGY OF ACTIVATION Lower Ea = Faster rxn A) ∆E does NOT change B) Ea is SMALLER C) LOWERING Link to collision theory animation

HW 11 -3, #10 A – WHAT IS AN ENZYME? A) Enzymes are biological catalysts that speed up the rate of chemical reactions inside your body.

HW 11 -3, #10 B – WHY ARE ENZYMES IMPORTANT? B) Enzymes control the rates of virtually all important chemical reactions in your body.

PICTURE OF ENZYME CATALYST Active site Enzyme link HW 11 -3, #10

Active site

ENZYME ACTIVE SITE WILL ONLY ACCEPT SPECIFIC SUBSTRATES REACTANTS WITH CORRECT SIZE AND SHAPE