Session 7 Integral and differential method. Integral method of analysis of data First order reversible reaction At equilibrium dC A /dt = 0.

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Presentation transcript:

Session 7 Integral and differential method

Integral method of analysis of data First order reversible reaction At equilibrium dC A /dt = 0

Integral method of analysis of data Reaction of shifting order Low C A High C A

Integral method of analysis of data Ex. In a batch reactor The composite of A in the reactor is measured at various times and shown in table, find the rate equation to represent the data

Integral method of analysis of data Guess first order reaction

Integral method of analysis of data Guess second order reaction

Integral method of analysis of data Guess nth order reaction We use the fractional life method with F=80%

Integral method of analysis of data For C A0 =10 and F=80%

Differential method of analyses of data The differential method of analysis deals directly with the differential rate equation to be tested.. The procedure is: 1. Plot the C A vs. t data, and then bye eye carefully draw a smooth curve to represent the data. 2. Determined the slope of this curve (dC A /dt = r A ) at suitably selected concentration value. 3. Search for a rate expression to represent this r A vs. C A data, either by: b- guess nth order rate equation a- guess rate form – r A = kf(C A )