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Useful formulae for Chemical Kinetics exam
Typology: Cheat Sheet
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Rate of appearance of C =^ +d[C]dt
Rate of appearance of D =^ +d[D]dt
Unit of rate of reaction = mol L-1s-^1
x y
Remember: Order cannot be determined with a given balanced chemical equation. It can be experimentally determined.
If rate law expression for a reaction is Rate = k [A] [B] Order of reaction = x + y
u
If we plot a graph between concentration of R vs time, the graph is a straight line with slope equal to -k and intercept is equal to [Ro]
where ‘k’ is rate constant, [Ro] is initial molar conc., [R] is final molar conc. after time ‘t’
of the type
i i t
k = 2.303^ log p t (2p -p ) Where: pi is initial pressure of A pt is total pressure of gaseous mixture containing A , B, C Remember: pt = pA + pB + pC