Modification of the Hertz-Langmuir Equation as Applied to Decomposition Reactions

4 Modification of the Hertz-Langmuir Equation as Applied to Decomposition Reactions 

Consider first the form of the Hertz-Langmuir equation for the particular case of decomposition of reactant R in vacuum into gaseous products A and B in the reaction 

To apply Eq. 3.8 to reaction (3.10), we have first to recall the condition of congruent vaporization 

The total flux of gaseous products Js (in units of kg m s ) in reaction (3.10) can be written as 

Replacing Pb with Pa (or vice versa) with the use of Eq. 3.12, we arrive at 

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