(a)
Interpretation: The energy diagram for the concerted reaction with
Concept introduction: The reactions in which product are formed by the breaking and making of bonds in a single step are known as concerted reactions. The activation energy
(b)
Interpretation: The energy diagram for a two-step reaction,
Concept introduction: The reactions in which product are formed by the breaking and making of bonds in a single step are known as concerted reactions. The activation energy
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- (a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion.Reaction rates increase with increasing temperature.The slowest step in a reaction is called the rate-determining step.Catalysts increase reaction rates.The fastest step in a reaction is called the rate-determining step.As a reaction progresses its rate goes down.Reaction rates can show little change as masses of solid reactants increase.arrow_forwardDraw an energy diagram for each reaction. Label the axes, the startingmaterial, product, transition state, ΔHo, and Ea.a.) a concerted reaction with ΔHo = −80 kJ/mol and Ea = 16 kJ/molb.) a two-step reaction, A → B → C, in which the relative energy of thecompounds is A < C < B, and the step A → B is rate-determiningarrow_forward(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. The fastest step in a reaction is called the rate-determining step. As a reaction progresses its rate goes up. The rate of a reaction is independent of temperature. As a reaction progresses its rate goes down. Reactions involving very unstable combinations of chemicals have small rate constants. O Reaction rates decrease with increasing temperature. xarrow_forward
- The rate law for the reaction NO₂ (g)+CO(g) → NO(g)+CO₂ (g) is rate k[NO₂]² ; one possible mechanism is shown on p. 717.(a) Draw a reaction energy diagram for that mechanism, giventhat ΔH°overall =-226 kJ/mol.(b) Consider the following alternative mechanism:Is the alternative mechanism consistent with the rate law? Isone mechanism more reasonable physically?arrow_forward(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. The fastest step in a reaction is called the rate-determining step. As a reaction progresses its rate goes up. The rate of a reaction is independent of temperature. As a reaction progresses its rate goes down. Reactions involving very unstable combinations of chemicals have small rate constants. Reaction rates decrease with increasing temperature.arrow_forwardFor the reaction ABC + D⇌ AB +CD, ΔHrxn°=-55 kJ/mol and Ea(fwd)=215 kJ/mol. Assuming a one-stepreaction, (a) draw a reaction energy diagram; (b) calculate Ea(rev);and (c) sketch a possible transition state if ABC is V-shaped.step, (a) draw a reaction energy diagram; (b) calculate ΔHrxn°;and (c) sketch a possible transition statearrow_forward
- = ○ KINETICS AND EQUILIBRIUM Drawing the reaction energy diagram of a catalyzed reaction Sketch a qualitative reaction energy diagram for a chemical reaction with and without a catalyst. Assume the uncatalyzed reaction is exothermic. Note: Because the sketches are only qualitative, the energies in them don't have to be exact. They only have to have the right relationship to each other. For example, if one energy is less than another, that fact should be clear in your sketch. energy Uncatalyzed reaction reactants Ea reaction coordinate products energy Catalyzed reaction reactants Ea reaction coordinate 0/3 productsarrow_forward(a) Select all of the correct statements about reaction rates from the choices below. 1.The lower the rate of a reaction the longer it takes to reach completion.2 The rate of a reaction is independent of temperature.3 Slow reactions can be speeded up by raising the temperature.4. Reaction rates increase with increasing temperature.5. Solid catalysts do not affect reaction rates.6. Reactions involving very unstable combinations of chemicals have large rate constants.7. A balanced chemical reaction is necessary to relatearrow_forward(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. As a reaction progresses its rate goes up. As a reaction progresses its rate goes down. Reactions involving very unstable combinations of chemicals have small rate constants. Reaction rates increase as reactant concentrations decrease. Reaction rates always increase as masses of solid reactants increase. A balanced chemical reaction is necessary to relate the rate of disappearance of a reactant to the rate of appearance of a product.arrow_forward
- The conversion of (CH3)3CI to (CH3)2C=CH2 can occur by either a onestepor a two-step mechanism, as shown in Equations [1] and [2]. Question: Assume Equation [1] represents an endothermic reaction and draw an energy diagram for the reaction. Label the axes, reactants, products,Ea, and ΔHo. Draw the structure for the transition state.arrow_forward(a) Select all of the correct statements about reaction rates from the choices below. The lower the rate of a reaction the longer it takes to reach completion. A balanced chemical reaction is necessary to relate the rate of reaction to the concentration of a reactant. As a reaction progresses its rate goes down. The rate of a slow step has more effect on the overall reaction rate than the rate of a fast step. Reaction rates are determined by reactant concentrations, temperatures, and reactant stabilities. Reaction rates increase with increasing temperature. Reactions involving very unstable combinations of chemicals have large rate constants.arrow_forwardDraw the appropriate fishhook arrows for the following reaction, and label each step with one of the following (homolytic bond cleavage, addition to a pi bond, hydrogen abstraction, halogen abstraction, elimination, coupling): ·Br: Н— Вг -Br Br -Br ·Br:arrow_forward
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