Effects of Background Gases on the Homogeneous Nucleation of Vapors. 1

Abstract

We report new results of nucleation measurements carried out in our laboratory at a variety of constant total pressures for 1-propanol vapor with nitrogen, helium, and hydrogen as background gases and for 1-butanol vapor with nitrogen and hydrogen as background gases. In addition, we report new results of nucleation experiments carried out at a variety of constant temperatures for 1-butanol with helium and hydrogen as background gases. The 1-butanol constant temperature results compare favorably with the results of the 1-butanol constant total pressure experiments, and the constant total pressure data for 1-propanol obtained in this investigaton compare favorably with constant temperature results obtained from 1-propanol experiments described in the literature. The results of this investigation (continue to) suggest a significant role of the background gas in the nucleation process. Our constant pressure and constant temperature experiments reported here give new results that reinforce our earlier observa...