University Chemistry ›› 2021, Vol. 36 ›› Issue (2): 2002037.doi: 10.3866/PKU.DXHX202002037

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Analysis of the Temperature Deviation for Boiling of Liquid and Condensation of Vapor Using Kelvin Equation

Zhibin Tao, Shuyong Zhang()   

  • Received:2020-02-20 Accepted:2020-03-30 Published:2020-04-13
  • Contact: Shuyong Zhang


The discrepancies for calculating condensation temperature and boiling temperature for droplet and small bubble using Kelvin equation were discussed. The discrepancies can be ascribed to the neglect of variation of the vapor pressure of curved surface to plain surface with temperature, and the misusing of Kelvin equation for small bubble during boiling. The way to reduce the discrepancy is introduced while the applicability of Kelvin equation is discussed.

Key words: Kelvin equation, Curved surface, Vapor pressure, Boiling, Condensing