As one learns in general chemistry, there is a heat of reaction for all reactions that take place. To assume that there is no change in temperature would be to assume that the heats of reactions exactly cancel each other out. The likelihood of this is very small, but not impossible. In the most general case, the heats of reaction (also called heat of formation) would be multiplied by its respective stoichiometric coefficient and then summed together to obtain the total heat change within the system of reactions. In this case, the heat of reaction is determined by the following equation:
Where Per (cm) is the perimeter of
the channel, FT is the total flow rate (moles/s), Cp
is the heat capacity (J/mol),
DHi
is the total heat of reaction (J/mol), and ri
is the reaction rate (mol/cm s). The heats of reactions are
determined by taking the heat of formation of each species within
a single equation and multiplying them by their respective
stoichiometric coefficient. The summation of these products
results in the total heat of reaction. The change in temperature
simultaneously changes the rate of
reaction since it is a function of temperature.
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