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Resolver y explicar detalladamente 6 . 8 V . Y . , Konyukhov, N . V . Kul'kova, and M . I. Temkin [ Kinet
Resolver explicar detalladamente V Y Konyukhov, N V Kul'kova, and M I. Temkin Kinet
Catal., studied the kinetics of the hydrogena
tion of benzoic acid A to cyclohexylcarboxylic acid B over
palladium on an activated charcoal catalyst.
At typical reaction conditions hydrogen gas is passed through
a wellstirred solution of benzoic acid in liquid butanol in
which very fine catalyst particles are suspended.
a These authors suggested that the mechanism of this reac
tion is of the following form:
where o represents a vacant surface site and where the
species in parentheses represent adsorbed reaction inter
mediates. Because the last stcp eccurs so rapidly, surface
coverage by species is very, very small ie~~
b Figare P is a plot of the total rate of product fot
mation versus mass of suspended catalyst for reaction at
an initial benzoic acid coscentration of M and
a hydrogen pressure of utm. What are the implications
of this figure?
Figure P is a plot of the reaction rate per unit
mass of catalyst versus the product The data cor
respond to reaction at at a catalyst leading of
The data in the figure represent two types of experiments:
the diamonds correspond to data at a fixed acid concen
tration and variable hydrogen pressure.
The triangles in the figure correspond to a constant hydro
gen pressure of atm.
Is the proposed mechanism consistent with the data?
Determine numerical values for any kinetic parameters
or their products or quoticnts for which this is possible.
Figure P Dependence of reaction rate on the mass of catalyst
present.
dependence of the rate law on the concentration of benzoic acid and
hydrogen presiure.RER
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