Adiabatic temperature rise, flame combustion

Or, more generally, to one-step reactions with a relatively weak dependency on T. This may occur in combusting flows where the adiabatic temperature rise is small for example, in a rich flame near extinction. 

The experimental data and the calculations involved in the determination of a reaction enthalpy by isoperibol flame combustion calorimetry are in many aspects similar to those described for bomb combustion calorimetry (see section 7.1) It is necessary to obtain the adiabatic temperature rise, A Tad, from a temperaturetime curve such as that in figure 7.2, to determine the energy equivalent of the calorimeter in an separate experiment and to compute the enthalpy of the isothermal calorimetric process, AI/icp, by an analogous scheme to that used in the case of equations 7.17-7.19 and A /ibp. The corrections to the standard state are, however, much less important because the pressure inside the burner vessel is very close to 0.1 MPa. 

Fig. 1.18 An adiabatic flame calorimeter, an example of an isobaric calorimeter, consists of this component immersed in a stirred water bath. Combustion occurs as a known amount of reactant is passed through to fuel the flame and the rise of temperature is monitored.

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