"h2ov" - 1 õppematerjal

Füüsikaline keemia II eksami konspekt

saa tuletada reaktsiooni stöhhiomeetriaga. Reakstioon aA+bB=dD+eE ei ütle meile palju reakstiooni mehhanismist. Kõige lihtsam näite on 1.22 A+B A---B C + B Kompleks reaktsioon kooseb vähemalt kahest osast. Eksponentsiaalne kiiruse võrrand ja stöhhiomeetrilise koefitsendi võrrandid ei sobi. C12H22O11 + H2O C6H12O6 + C6H12O6 (1.23) Sucrose Glucose Fructose r = k[C12H22O11]. r = k' [C12H22O11] [H2O]v. k = k´H2Ov The number of molecules which react in an elementary step is called the molecularity of the elementary reaction. Molecularity is defined only for elementary reactions and should not be used to describe overall reactions that consist of more than one elementary step. In fact the only elementary reaction which exists is the bimolecular one. However, all the types of reactions given below are considered to be elementary reactions