(a)
Interpretation:
The rate law has to be written for the given elementary reaction.
Concept Introduction:
For elementary reactions, rate law can be written using stoichiometry. The order of unimolecular reaction is one and bimolecular reaction is two. In a bimolecular reaction if the reactants are different then order with respect to each reactant will be one in order to make the overall order two.
(b)
Interpretation:
The rate law has to be written for the given elementary reaction.
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
The rate law has to be written for the given elementary reaction.
Concept Introduction:
Refer to part (a).
(d)
Interpretation:
The rate law has to be written for the given elementary reaction.
Concept Introduction:
Refer to part (a).
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Chapter 11 Solutions
OWLv2 for Moore/Stanitski's Chemistry: The Molecular Science, 5th Edition, [Instant Access], 1 term (6 months)
- Distinguish between the differential rate law and the integrated rate law. Which of these is often called just the rate law? What is k in a rate law, and what are orders in a rate law? Explain.arrow_forwardThe Raschig reaction produces the industrially important reducing agent hydrazine, N2H4, from ammonia, NH3, and hypochlorite ion, OCl−, in basic aqueous solution. A proposed mechanism is Step 1: Step 2: Step 3: What is the overall stoichiometric equation? Which step is rate-limiting? What reaction intermediates are involved? What rate law is predicted by this mechanism?arrow_forward. find the rate law predicted for a particular reaction mechanism.arrow_forward
- In a study of nitrosyl halides, a chemist proposes the fol-lowing mechanism for the synthesis of nitrosyl bromide:(1)NO(g)+Br₂(g)→NOBr₂(g)[fast] (2)NOBr₂(g)+NO(g)→ 2NOBr(g)[slow].If the rate law is rate k[NO]²[Br₂], is the proposed mechanismvalid? If so, show that it satisfies the three criteria for validity.arrow_forwardThe reaction O₂(g) + 2 NO(g) → 2 NO₂(g) was studied at a certain temperature with the following results: (a) What is the rate law for this reaction? O Ratek [0₂(9)] [NO(g)] O Ratek [0₂(9)]² [NO(g)] O Rate = k [0₂(9)] [NO(g)]² O Ratek [0₂(9)]² [NO(g)]² O Ratek [0₂(9)] [NO(g)]³ O Rate = k [O₂(g)]* [NO(g)] (b) What is the value of the rate constant? Experiment [0₂(9)] (M) 0.0235 0.0235 0.0470 0.0470 [NO(g)] (M) 0.0235 0.0470 0.0235 0.0470 Rate (M/S) 0.158 0.633 0.317 1.27 (c) What is the reaction rate when the concentration of O₂(g) is 0.0318 M and that of NO(g) is 0.0649 M if the temperature is the same as that used to obtain the data shown above?arrow_forwardThe reaction 2 NO(g) + O₂(g) -> 2 NO₂(g) proceeds through the following mechanism: (a) The second step of this mechanism is rate-determining (slow). What is the rate law for this reaction? Ratek [NO] (O₂) Rate-k [NO] [0₂] Ratek [NO] [O₂)² Ratek [NO]1/2 [0₂] Ratek [NO] [0₂]1/2 O Rate-k [NO] 2 NO(g)--> N₂O₂(9) N₂O₂(g) + O₂(9) --> 2 NO₂(9) Ratek [NO]2 [0₂11/2arrow_forward
- The isomerization of cyclopropane, C3H6, to propylene, CH2=CHCH3, is first order in cyclopropane and first order overall. At 1000oC, the rate constant is 9.2/s. (a) What is the half-life of cyclopropane at 1000oC? (b) How long would it take for the concentration of cyclopropane to decrease to 50% of its initial value? (c) To 25% of its initial value?arrow_forwardThe reaction 2 NO₂(g) + O₂(g) → N₂O5(g) + O₂(g) was studied at a certain temperature with the following results: (a) What is the rate law for this reaction? Rate = k [NO₂(g)] [03(g)] O Rate = k [NO₂(g)]² [03(g)] O Rate = k [NO₂(g)] [03(g)]² O Rate = k [NO₂(g)]² [03(g)]² O Rate = k [NO₂(g)] [03(g)]³ O Rate = k [NO₂(g)]* [03(g)] (b) What is the value of the rate constant? 137268 Experiment M/S AWNPE 1 2 3 4 [NO₂(g)] (M) 0.718 0.718 1.44 1.44 [03(g)] (M) 0.718 1.44 0.718 1.44 Rate (M/s) (c) What is the reaction rate when the concentration of NO₂(g) is 1.26 M and that of O3(g) is 2.10 M if the temperature is the same as that used to obtain the data shown above? 26600 53400 53400 1.07e+05arrow_forward[4] Consider the following mechanism for the reaction of nitric oxide and hydrogen: kı 2NO(g)+ H2(g) → N;O(g) + H¿O(g) slow k2 N,0(g) + H2(g) → N2(g) + H2O(g) fast (a) Write an equation for the overall reaction. (b) Write the theoretical rate law for the above mechanism. (c) Is a catalyst involved in the above mechanism? If so, what is it? (d) Are there any reaction intermediates? If so, list them.arrow_forward
- Consider the following reaction: 4 HBr(g) + O2(g) 2 H2O(g) + 2 Br2(g) (a) The rate law for this reaction is first order in HBr(g) and first-order in O2(g). What is the rate law for this reaction? Rate = k [HBr(g)] [O2(g)]Rate = k [HBr(g)]2 [O2(g)] Rate = k [HBr(g)] [O2(g)]2Rate = k [HBr(g)]2 [O2(g)]2Rate = k [HBr(g)] [O2(g)]3Rate = k [HBr(g)]4 [O2(g)] (b) If the rate constant for this reaction at a certain temperature is 9920, what is the reaction rate when [HBr(g)] = 0.00467 M and [O2(g)] = 0.00876 M?Rate = M/s.(c) What is the reaction rate when the concentration of HBr(g) is doubled, to 0.00934 M while the concentration of O2(g) is 0.00876 M?Rate = M/sarrow_forwardConsider the following hypothetical reaction: 2P + Q→ 2 R + S. The following mechanism is proposed for this reaction: P + P = T (fast) Q + T → R+ U (slow) U-R + S (fast) Substances T and U are unstable intermediates. What rate law is predicted by this mechanism? (a) Rate = k[P]? (b) Rate = k[P][Q] (c) Rate = k[P]°[QI (d) Rate = k[P][Q? (e) Rate = k[U]arrow_forwardConsider the following reaction: 4 HBr(g) + O2(g) 2 H2O(g) + 2 Br2(g) (a) The rate law for this reaction is first order in HBr(g) and first order in O2(g). What is the rate law for this reaction? Rate = k [HBr(g)] [O2(g)] Rate = k [HBr(g)]2 [O2(g)] Rate = k [HBr(g)] [O2(g)]2 Rate = k [HBr(g)]2 [O2(g)]2 Rate = k [HBr(g)] [O2(g)]3 Rate = k [HBr(g)]4 [O2(g)]arrow_forward
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