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Ch.14 - Chemical Kinetics
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All textbooksTro 4th EditionCh.14 - Chemical KineticsProblem 106

Chapter 14, Problem 106

Consider the reaction: 2 NH3(aq) + OCl - (aq)¡N2H4(aq) + H2O(l ) + Cl - (aq) This three-step mechanism is proposed: NH3(aq) + OCl - (aq) Δk1k2NH2Cl(aq) + OH- (aq) Fast NH2Cl(aq) + NH3(aq) ¡k3N2H5+ (aq) + Cl - (aq) Slow N2H5+ (aq) + OH- (aq) ¡k4N2H4(aq) + H2O(l ) Fast a. Show that the mechanism sums to the overall reaction.

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Hi everyone here we have a question asking us to identify the overall reaction for the reaction mechanism below. A. B plus C to D. Forms A C to D plus B. Fast. B plus A B forms A B to slow A C to D plus A B. To form A to B to C. To D. Fast. So let's cancel out what we can. So we have a C. To D. Here and here. So those will cancel out and then we have B here and here. So those will cancel out and then we have a. B. Two here and here. So those will cancel out. This gives us the overall reaction of to A B plus C to D. Forms a two B C to D. And that is our final answer. Thank you for watching. Bye.
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Textbook Question

Anthropologists can estimate the age of a bone or other sample of organic matter by its carbon-14 content. The carbon-14 in a living organism is constant until the organism dies, after which carbon- 14 decays with first-order kinetics and a half-life of 5730 years. Suppose a bone from an ancient human contains 19.5% of the C-14 found in living organisms. How old is the bone?

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Textbook Question

Consider the gas-phase reaction: H2(g) + I2(g) → 2 HI(g) The reaction was experimentally determined to be first order in H2 and first order in I2. Consider the proposed mechanisms. Proposed mechanism I: H2(g) + I2(g) → 2 HI(g) Single step Proposed mechanism II: I2(g) Δk1k-12 I(g) Fast H2( g) + 2 I( g) → k22 HI( g) Slow a. Show that both of the proposed mechanisms are valid.

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Textbook Question

Consider the gas-phase reaction: H2(g) + I2(g) → 2 HI(g) The reaction was experimentally determined to be first order in H2 and first order in I2. Consider the proposed mechanisms. Proposed mechanism I: H2(g) + I2(g) → 2 HI(g) Single step Proposed mechanism II: I2(g) Δk1k-12 I(g) Fast H2( g) + 2 I( g) → k22 HI( g) Slow b. What kind of experimental evidence might lead you to favor mechanism II over mechanism I?

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Textbook Question

Ethyl chloride vapor decomposes by the first-order reaction: C2H5Cl → C2H4 + HCl The activation energy is 249 kJ/mol, and the frequency factor is 1.6⨉1014 s-1. Find the value of the rate constant at 710 K.

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