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Write an essay on factors which affect the rate of reactions and discuss the uses of kinetic studies. AL Chemistry p. 1.

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Presentation on theme: "Write an essay on factors which affect the rate of reactions and discuss the uses of kinetic studies. AL Chemistry p. 1."— Presentation transcript:

1 Write an essay on factors which affect the rate of reactions and discuss the uses of kinetic studies. AL Chemistry p. 1

2 Write an essay on factors which affect the rate of reactions and discuss the uses of kinetic studies. AL Chemistry p. 1

3 # Guidelines # AL Chemistry p. 2 0.Introduction: Kinetics is influenced by many experimental conditions (factors) Part A:Factors affecting Rate of Reaction Part B:Uses of Kinetic Studies

4 AL Chemistry p. 3 A1.Temperature (a)Collision Theory [velocity, K.E. of molecules] (b)M. B. Distribution (c)Arrhenius eqn. (E A ) EAEA

5 AL Chemistry p. 4 A2.Concentration concentration  freq. of collisions  chance of effective collisions 

6 AL Chemistry p. 5 A3.Pressure for reactions involving gases only (solid & liquid are not compressible) pressure , no. of eff. collisions 

7 p. 6 A4.Catalyst (a)definition (b)new pathway with lower E A (c)M. B. Distribution AL Chemistry

8 p. 7 A5.Other Factors (a)surface area  state of subdivision  e.g. marble chips VS powdered CaCO 3 (b)light  photosynthesis  silver salt & photographic film

9 AL Chemistry p. 8 Optimization of Industrial Production of Chemicals maximum yield minimum raw materials minimal fuel B1.Industry shortest time

10 AL Chemistry p. 9 Slow down unwanted reactions (a)deterioration of food (b)rusting B2.Society

11 AL Chemistry p. 10 Carbon-14 dating of Fossil and Prehistorical Remains B3.Archaeological Investigation (radioactive decay: first order reaction)

12 AL Chemistry p. 11 rate equation B4.Studying Reaction Mechanism  deduce the species involved in r.d.s.  species involved in formation of T.S.  molecularity of reaction  e.g. S N 1 or S N 2


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