Question

For the elementary reaction: A ? B with forward and backward rate constants k? and k?? respectively, we measured a ?G? for the reaction of ?2 kJ/mol, and an activation free energy ?G?‡ of 7 kJ/mol (for the forward reaction). a. What is the activation free energy barrier for the backward reaction? b. If initially we have [B]?= 0, which one of these two sketches best represents the concentration of A and B versus time at 25 °C? Explain in detail! c. Sketch the forward and backward rates versus time (again, if [B]?=0), in the same plot. Sketch means that you do not need to put actual numbers, but you need to have axes, labels, and show limits (what happens as t ? 0 < as t ? infinite? etc) d. Sketch [A]/[B] at equilibrium as a function of Temperature e. At what temperature will the forward rate be 2 times faster than at 25 °C? To answer this section requires solving for a weird equation. Please google how to solve an equation iteratively, or you can try plotting data and extracting the answer. f. Write the expression for the forward and backward rate constant at the temperature derived in e.

          For the elementary reaction:
A ? B with forward and backward rate constants k? and k?? respectively, we measured a ?G? for the reaction of ?2 kJ/mol, and an activation free energy ?G?‡ of 7 kJ/mol (for the forward reaction).

a. What is the activation free energy barrier for the backward reaction?

b. If initially we have [B]?= 0, which one of these two sketches best represents the concentration of A and B versus time at 25 °C? Explain in detail!

c. Sketch the forward and backward rates versus time (again, if [B]?=0), in the same plot. Sketch means that you do not need to put actual numbers, but you need to have axes, labels, and show limits (what happens as t ? 0 < as t ? infinite? etc)

d. Sketch [A]/[B] at equilibrium as a function of Temperature

e. At what temperature will the forward rate be 2 times faster than at 25 °C? To answer this section requires solving for a weird equation. Please google how to solve an equation iteratively, or you can try plotting data and extracting the answer.

f. Write the expression for the forward and backward rate constant at the temperature derived in e.

Show more…

For the elementary reaction:
A ? B with forward and backward rate constants k? and k?? respectively, we measured a ?G? for the reaction of ?2 kJ/mol, and an activation free energy ?G?‡ of 7 kJ/mol (for the forward reaction).

a. What is the activation free energy barrier for the backward reaction?

b. If initially we have [B]?= 0, which one of these two sketches best represents the concentration of A and B versus time at 25 °C? Explain in detail!

c. Sketch the forward and backward rates versus time (again, if [B]?=0), in the same plot. Sketch means that you do not need to put actual numbers, but you need to have axes, labels, and show limits (what happens as t ? 0 < as t ? infinite? etc)

d. Sketch [A]/[B] at equilibrium as a function of Temperature

e. At what temperature will the forward rate be 2 times faster than at 25 °C? To answer this section requires solving for a weird equation. Please google how to solve an equation iteratively, or you can try plotting data and extracting the answer.

f. Write the expression for the forward and backward rate constant at the temperature derived in e.

Added by Mercedes W.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Shaiju T

04/16/2022

Step 1

The activation free energy barrier for the backward reaction can be calculated using the equation ΔG°+ (backward) = ΔG°+ (forward) + ΔG" = 7 kJ/mol + 2 kJ/mol = 9 kJ/mol. b. If initially [B]₀ = 0, then the reaction can only proceed in the forward direction until Show more…

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For the elementary reaction: A ⇌ B with forward and backward rate constants k₁ and k₋₁ respectively, we measured a ΔG⁰ for the reaction of −2 kJ/mol, and an activation free energy ΔG⁰‡ of 7 kJ/mol (for the forward reaction). a. What is the activation free energy barrier for the backward reaction? b. If initially we have [B]₀= 0, which one of these two sketches best represents the concentration of A and B versus time at 25 °C? Explain in detail! c. Sketch the forward and backward rates versus time (again, if [B]₀=0), in the same plot. Sketch means that you do not need to put actual numbers, but you need to have axes, labels, and show limits (what happens as t → 0 < as t → infinite? etc) d. Sketch [A]/[B] at equilibrium as a function of Temperature e. At what temperature will the forward rate be 2 times faster than at 25 °C? To answer this section requires solving for a weird equation. Please google how to solve an equation iteratively, or you can try plotting data and extracting the answer. f. Write the expression for the forward and backward rate constant at the temperature derived in e.

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00:01 Hello student we have been question that is asked here we have given one elementary reaction which is a gives us to b which is a forward and backward reaction the constant here k1 and k2 then we measure the delta d0 of the reaction which is here we have given minus to kilojou per mole so here we have plotted a graph so here minus two kilojou per more which is given and the activation energy which is g0 plus which is here we have given plus 7 kilojoule for more for forward reaction in the a bit which is actually calculate the activation energy activation what free energy for barrier for the backward reaction so in the fast beat we write the answer here we write in the a bit here we have given delta g0 is equal to minus 2 kilo jule per mole here we can write activate here you write what activation free energy here you write activation free energy of forward reaction here right of forward reaction which is equal to here you right delta g0 here you write delta g0 right delta g0 t is equal to what plus 7 kilo formal so the activation right activation what free energy here you write energy of what backward reaction here right backward reaction which is here we write what here we write the delta g0 b is equal to delta what is delta g0 f minus delta g0 here write delta what is g0 here write delta g0 which is equal to here we putting the value delta g0 f the value is plus 7 then minus what is delta g0 the value of delta g0 which is minus 2 so you write minus 2 so which is equal to plus 9 kilo zoule per mole so let the value of what delta g0 b which is plus 9 kilojoule per mole which is our answer for a bit we comes from the b bit you write the b bit so here we using the relation of here delta g 0 is equal to minus r t ln what l n k q q equation or k eq it implies that k eq is equal to experiment here right experiment which is multiplied by minus delta g 0 here right what minus delta g 0 right minus delta g 0 which is divided by r t so is equal to experiment here right experiment which is multiplied by minus which is multiplied by 1 ,000 then which is divided by 8 .314 which is multiplied by 298 which is so here we write we imply that the k eq is equal to 2 .24 is our answer here so we can write what keque is equal to the concentration of a b eq divided by the…

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