Project ForgeChemical Reaction Engineering
Reaction Kinetics
GATE 2009
Medium
For a homogeneous reaction system, where Cj is the concentration of j at time t, Nj is the number of moles of j at time t, V is the reaction volume at time t, and t is the reaction time, the rate of reaction for species j is defined as
- AdCj/dt
- B−(dCj/dt)
- (1/V)(dNj/dt)
- D−(1/V)(dNj/dt)
Explanation
The general definition of the rate of formation of species j, valid even for variable-volume systems, is rj=(1/V)(dNj/dt). It is naturally negative for reactants (Nj decreasing) and positive for products, without needing a forced sign convention.
Source: GATE CH 2009 (2009)
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