AL Chemistry Write an essay on factors which affect the rate of reactions and discuss the uses of kinetic studies. p. 1
AL Chemistry Write an essay on factors which affect the rate of reactions and discuss the uses of kinetic studies. p. 1
AL Chemistry # Guidelines # 0. Introduction: Kinetics is influenced by many experimental conditions (factors) Part A: Factors affecting Rate of Reaction Part B: Uses of Kinetic Studies p. 2
(a) Collision Theory [velocity, K.E. of molecules] AL Chemistry A1. Temperature (a) Collision Theory [velocity, K.E. of molecules] EA (b) M. B. Distribution (c) Arrhenius eqn. (EA) p. 3
chance of effective collisions AL Chemistry A2. Concentration concentration freq. of collisions chance of effective collisions p. 4
for reactions involving gases only AL Chemistry A3. Pressure for reactions involving gases only (solid & liquid are not compressible) pressure , no. of eff. collisions p. 5
(b) new pathway with lower EA AL Chemistry A4. Catalyst (a) definition (b) new pathway with lower EA (c) M. B. Distribution p. 6
e.g. marble chips VS powdered CaCO3 AL Chemistry A5. Other Factors (a) surface area state of subdivision e.g. marble chips VS powdered CaCO3 (b) light photosynthesis silver salt & photographic film p. 7
B1. Industry maximum yield minimum raw materials minimal fuel AL Chemistry B1. Industry Optimization of Industrial Production of Chemicals maximum yield minimum raw materials minimal fuel shortest time p. 8
(a) deterioration of food AL Chemistry B2. Society Slow down unwanted reactions (a) deterioration of food (b) rusting p. 9
B3. Archaeological Investigation AL Chemistry B3. Archaeological Investigation Carbon-14 dating of Fossil and Prehistorical Remains (radioactive decay: first order reaction) p. 10
B4. Studying Reaction Mechanism AL Chemistry B4. Studying Reaction Mechanism rate equation deduce the species involved in r.d.s. species involved in formation of T.S. molecularity of reaction e.g. SN1 or SN2 p. 11