PHYSICAL CHEMISTRY IN BRIEF

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 301 whereci,eqare the concentrations of the reactants in the state of chemical equilibrium ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 302 Obr.9.4:Time dependence of the reactants concentrations in the consecutive reaction A ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 303 9.4.9.4 Special cases a) Both rate constants are the same,k 1 =k 2 =k. Then cA=cA0e−kτ ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 304 9.5 Mechanisms of chemical reactions The simplest mechanisms [see9.5.1] were described ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 305 Note:The reaction H + Br 2 → HBr + Br is elementary. It is a bimolecular reaction. Hyd ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 306 Tabulka9.1:Types of elementary reactions and their kinetic equations. molecularity ele ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 307 used: rate-determining process principle, Bodenstein’s steady-state principle, pre-eq ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 308 i.e. the rate of formation of these species is almost equal to their rate of consumpti ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 309 From the form of the kinetic equation it is obvious that the reaction A→B is not a sim ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 310 whereKis the equilibrium constant of formation of the intermediate. This relation is a ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 311 Example The above mechanism is used to explain the oxidation of nitrogen oxide to nitr ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 312 Branched-chain reactions, in which more reactive intermediates are formed than consum ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 313 9.5.10 Radical polymerization Radical polymerization is a special case of a chain reac ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 314 Solution The energy of one photon was =hc/λ= 6. 626 · 10 −^34 · 2. 993 · 108 /(299. 3 ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 315 9.6 Temperature dependence of the rate of a chemical reaction The rate of reaction dep ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 316 increases, it is highly probable that it is a reaction mediated by living organisms de ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 317 Solution Substituting into relation (9.159) yields k= 1, 5 · 1015 e−^286600 /(8.^314 · ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 318 For the temperature dependence of the reaction rate constant (9.163) we then have k= ( ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 319 Solution We take the logarithm of equation (9.164) and substitute forTi,ki lnk 1 = ln ...

CHAP. 9: CHEMICAL KINETICS [CONTENTS] 320 In practice, the Arrhenius equation is used most often. The more general relation (9.1 ...