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- Q27. The gas phase reaction between SiH2 and H20 was studied, and the following mechanism was proposed. M is a buffer gas which takes away energy as heat; you can treat it as a regular reactant. 1) SİH2 + H20 F SİH2-H2O* K 2) SİH2-H2O* + M SİH3OH Assuming that the first step is a pre-equilibrium step and the second step is rate-limiting, derive the rate law for this mechanism.2NO2(g) + F2(g) -> NO2F(g) H°rxn = -284 kJ/molrxn NO2(g) and F2(g) can reactto produce NO2F(g), as represented above. A proposed mechanism for the reaction has two elementary steps, as shown below. Step 1: NO2 + F2 -> NO2F + F (slow) Step 2: NO2 + F -> NO2F (fast) a.) Write a rate law for the overall reaction that is consistent with the proposed mechanism. b.) On the incomplete reaction energy diagram below, draw a curve that shows the following two details. The relative activation energies for the two elementary steps The enthalpy change of the overall reaction Can all of them be solved please, and thank you very much!E (kJ-mol") s/d/e/1FAlpQLSSGCE8gt218c6JoHMWME1A8Nydt8M4g1yG93D-2LPpoMij_g/formResponse Question 39: Select the reactions in Figure 39 that can be represented by the accompanying energy diagram? * Reaction A Reaction B Reaction C Figure 39 t (s) CH-C-NH-CH D + HN-H + HO-O HO-H HO HCI CH-CH-CH3 oH + 20° LIFE Digital
- Refer to the following reaction mechanism CH-c-OCH, slow + OH fast CH-C-OH CH0 CH,-C-OCH OH fast CH,C-O CH,OH The least stoble transition state has which structure? 8- A. CH,-C-OCH, B. CH3-C 0CH, C. CH,-C-OCH, D. CH, COCH, OHU R V Reaction progress i. The rate-determining step of the reaction is ii. By Hammond's postulate, the rate of reaction will • if the intermediate T is stabilized (the energy of T is reduced). Gibbs Free EnergyEnergy 7. Consider the following energy diagram: (CH3)3C-OH (CH3)3C-ÕH₂ + HI + r a) Write the overall balanced chemical equation. Reaction coordinate (CH3)3C+ + H₂O + F b) How many steps are in the reaction mechanism? c) How many intermediates are in the reaction mechanism? d) Which step requires the most energy? (say step "X", where "X" is a number) e) CIRCLE ONE ANSWER. The overall reaction is an example of: substitution addition elimination (CH3)3C-I rearrangement
- Which is the correct depiction of the transition state for the reaction shown below? a с A b B Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. с H3CO H3CO. d D CH3 e C&D CH3 possible transition states CH3 CH3 CH3 CH3 H3CO H3CO H3CO H3CO yox yox sxx sx H3CO H3CO H3CO CH3 CH3 CH3 CH3 C D A B A H3CO H3CO, CH3 CH3Identify the correct rate equation for the two-step reaction below. + CH;OH OH O a. Rate=k[C(CH3)3|] Ob.Rate=k[C(CH3)3l][CH3OH] c. Rate=k[C(CH3)3l]? d. Rate=k[CH3OHJ?Pracdne o8 Consider the following reaction co-ordinate diagram H20 H20 Br A D Energy Reaction Co-ordinate a) Identify the various species on the diagram by adding the letter identifying each of the structures. b) Which species does the first transition state of the overall reaction most resemble? What kind of transition state is this? c) Which species does the second transition state of the overall reaction most resemble? What kind of transition state is this?
- Identify SN1 transition state properties. Choose one or more: O A. There are two transition states in an SN1 reaction. B. There is one transition state in an SN1 reaction. O C. The transition state(s) is/are higher in energy than the reactants. O D. The transition state(s) is/are lower in energy than the reactants. O E. The transition state(s) is/are higher in energy than the intermediate(s). F. The transition state(s) is/are lower in energy than the intermediate(s). O G. The transition state(s) have the same energy as the intermediate(s). O H. For a mechanism that contains n total steps, there must be ntotal transition states. O OThe exergonic reaction below involves multiple elementary steps and one of the intermediates in the reaction is shown in square brackets. Which statement is consistent with this reaction? HCI, H2O но OH O This is a rearrangement reaction O The low energy transition state makes the reaction exergonic O The reaction has at least two transition states and the products are lower in energy than the reactants O The intermediate in the reaction must be more stable than the reactants O The reaction has one transition state, and the products are lower in energy than the reactantsWhich step has the greatest rate constant in the forward direction in the reaction coordinate diagram shown below? F В C E A G A going to C E going to C O C going to E E going to G B going to D