reaction enthalpy number

reaction enthalpy number

[rē′ak·shən ′en‚thal·pē ‚nəm·bər]
(physical chemistry)
A dimensionless number used in the study of interphase transfer in chemical reactions, equal to the enthalpy of reaction per unit mass of a specified compound produced in a reaction, times the mass fraction of that compound, divided by the product of the specific heat at constant pressure and the temperature change during the reaction.