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Essentials of Chemical Reaction Engineering by H. Scott Fogler

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11.3.1 Dissecting the Steady-State Molar Flow Rates to Obtain the Heat of Reaction

To begin our journey, we start with the energy balance equation (11-9) and then proceed to finally arrive at the equations given in Table 11-1 by first dissecting two terms:

  1. The molar flow rates, Fi and Fi0
  2. The molar enthalpies, Hi, Hi0[HiHi(T), and Hi0Hi(T0)]

An animated version of what follows for the derivation of the energy balance can be found in the reaction engineering games “Heat Effects 1” and “Heat Effects 2” on the DVD-ROM. Here, equations move around the screen, making substitutions and approximations to arrive at the equations shown in Table 11-1. Visual learners find these two ICGs a very useful resource.

We will now consider flow systems ...

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