Chemical Kinetics Basic Notes, Summaries of Chemical Kinetics

This note was made as a preparation material for the General Chemistry non-major course. Here I have tried to describe rate law, molecularity, order of reaction, rate equations, half life of reaction.

Typology: Summaries

2024/2025

Available from 06/04/2026

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General @hemistn Y Intuoduetin + Chemial Kinehes / M5 Reeclin rate: ° Ale nale of nesotins is defined as the Change in eancenktakin of ony nertend on products pen uri} — lime A——+ 2 ninte of Resch ~ tate of clisa ppeanance of A + rate of oppermarce of G Or, male - = ala) a ab) L Bene .£ ) nepnesents encentnatin in mel L' ard ‘d' Represents infinitesimally small chore in Concentration - . ‘ > Average sude of reaction is a donokim £ tine Dy—tnf} BR Tneterlaneovs Rate of Rerclin : A+@ — >» @+) So, tnslarlencous palo , = — AlAs —_ aly at dt a) fp) + oe = e dhe instantaneous rate ts enpal, bh > At are time,’ Hine draan Agent +o the Gunve Iya slope of a straight ake dud time» > Concardnahim (roti!) - time ,& G) —> Roo ds is conten cith respect to the nent bots cars too Gin conte wale oquakim ite naspetk 4 preoduets if it ts a revensibte nesalim « Pn Aned- Ase. WA See two nate aquabim as well As hoo values of k. — he value of mand nan be small ingen Qyotim . Aho a Cave baer dbbaired oxperamertal ty » hot Gum due Tusthe = aquatin - , a» An expression bic shows hao the redclin tude ts nelated to apnoantralims is adled he rade “Paws ore nate oguatio . + Gemk 4. ONO, —7 ANo, +0» 5 take | k [Nor] et es mle EA EL 4 OND, 7 ONY ad, ) 3nd = [Rin] A. OND + Qu, —s Np +24U,0 5 rato = le CH.) [ony ICS} CamScanner Ch Onder of a nenckn 3 » Hone, faa reaction onder — Me onder of a nerchin is dofned as tee Sum if Ht powers of dua emcontrnkins in tte tale eo, lel oy, rade. = & TA)” [al &, - oncen of he puch = mer with nospeet to A is m and wrth cespoct b Bois Bh. Ovopall onder of penctin (nen) my Prange doom O 4 nr oven Aneel. 7 oO Axnmple_' Pale laa Ronotim Drden- ue tate doe Kk [n02} 2 nate > k[ MLW) ite tale zk [eae] tay lee = ————— — SITTER eet © Chemteal neackms an be alnssified int two types 3 1. Llementons neactims ¢ OGeuns in dosloite stop , Q. Cym plex negehims ¢ pceuns In tio on mone step « - Moleeylanity of A nosetiom ts the namben- f I oF preleceton neachent molecules involved In A reaatim - Num ber of reactint molecules invelved in tae reaction. moleculanity =) ——? Unimolaaulans nesatin- moleeulanily - 9 ———-» Gimoleoulan nection moloculani ty ~g ———= Renmlewlan neache~ ¥rcomple () Unimolecular neachm : H-@ — Goon 4 —@ — @roH- Ul a t! Kk —@- Coot Cootr-—@ — Ht Maleic acid Site atid. qw Bimoleoulan. noactis : of ——e %+ 4, (tg C00 G1 Oy + 0 ——> CH, Groep + @,Hs OH ci) Jermoleenlac reactions Onn +0, ——? 2NO0, QNo + Gl, ——* 2N0e{ QoXt ~ Moleeulanily of! a Corvplex Rorokm } NNW nA RR nen ~ Are slepaise sequence of elemertana nenckims Lad emvent neratims +, products is anted he mecbonisn~ of feackion . — Ye slowest step is the rato- detente sheep of Abe nerekin. Lxsonple ! 2QNi05 ——* Avion + 0» rg Me Stop-3 ON, 0, —— 2nd. + 203 ' (6low) Lr . Shop-l : WO. + NO; -—> NO + NO, 4 On (slow) © Sep-3 NO + NDz ——> ZNO, (dest) Dvondt : 2N,0- ——* BAW. + 0; a ba, toe moleculanity oF & eamples rvatin is Aba unbe of yo lecules om toms taking pad in dhe rade dolenninirg slop - Renctins step orn shops . e Diffononee, belueen Onder: and es) Moleculani _ _VePsus Bnden of Reralion } Moleaulars q : etd Moleaulanity , and ondon Ane tdertiaat Ln Clemirtony Onden of a Roretimn Holeculanity of @ Rosokin 1. Tt is dhe SUM of powers of the @oneontuhin +tonms in he nate law Oxpnessim , Speaies undangoin Sim ple poachm 2. His the number of neatin simultencous @llisim in the Hernertag ore 9% TH is an experiment, defenmined value 2. Te ic a haonibterl doncopt - 9.7 an tor froalimel value. 9. SH is alton A Whole number A. T+ an assume dono value . 4. Tt aemot have 20no value. 5. Onder of @ nesctm oan alana wilh the Grditims such as ponessune, Jemeerotune , Goncen brahon . Cgpehir . §. Malpenlonity ets invariant fn a chemial reacim ~ | Lxomel @ [ Hydra acts of a estor.} CH, - C00 CH + H,6 ——» @,@0oH + Gon Otny| dette — (C0085) acetic Clu! aeid Aleoho! rte = k | CH; Coots) [y,0] = Kk! [cus 00, Hy) She neachn is aalually seeord onder. bud tn prachoo tt is Lund Jy bo thet onden. Sus ft ic @ joseudo - finet onder reaction - oe & Rate _ ea vakin~ of S0n> Ordon reackm | hezelon : Trtiok doe. Final Cone - independent of tue. aancarnelin~ of tux A —+ Products a (0) a-x Mh at d (a-y k,@%4 =k, dx Ge ~ ke oe $0, (0) become . —In @xn = kte- Ina D ke = Inma- tla L A Ke rs bn, a Chacging +. Gammon loganttams - [x he 4 Somekmes , La inlepeled nate lay in due Litoue Cu is also used : k 9.304 tag aan q —» Ralo Quatin in lens of Voluynes ' Wa know, ; ’ oe ameontuahm % So, k= BOPP yy eo ve dy ak V, = Trifial volume, = le. 2,00 lo a an Mie = Volume ab +e Up = Fir volume | i stad (Lev) , Vy = 0 | { —» Cole egpatio th terms of optical Rotabim t CUCU N NN naan I, = Rotatim at foo tl, = Metotim ot tine +. Ty = no thr after tegdkin dampler— —» txample of Soeord onder. necckme ! [Hydeotasis of on Eston. ly Naver] OU, God C, Us e NaOte ———p Gy CoNn + Gb Ou ——_____ On integration 2u gives : ax re k fat > 9 i = T kt +2 d Ui = bance # Ge») _—_o integer] Putins x20 and 4-0 at O , we get: \ T= oh By suboeti baby value fT in,