Nucleation in Binary Vapors. Part 1: Additional Theoretical Considerations. Part 2: Time Lags,
YALE UNIV NEW HAVEN CONN DEPT OF ENGINEERING AND APPLIED SCIENCE
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A quantitative study of nucleation in vapor mixtures of ethanol and water near 273C is presented. Reiss theory of binary nucleation is reexamined and extended to yield the proper limit for homogeneous nucleation in a one-component system. A corrected expression for the equilibrium concentration of mixed clusters is derived. Calculations of the critical vapor activities needed to produce a visible condensate are presented. The role of the time lag needed to attain steady state nucleation in binary vapors is discussed. Under appropriate conditions it is possible to obtain both a large predicted rate of binary nucleation and a large time lag. Approximate formulae for the time lags are developed in this part, and representative calculations for the enthanol-water system are reported.
- Physical Chemistry