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Citation: LI Ai-Chang, ZHAO Di. Discussion on Thermodynamic Formula and the Gas-Liquid Equilibrium Condition for Spherical Droplet[J]. University Chemistry, ;2017, 32(4): 61-67. doi: 10.3866/PKU.DXHX201609019 shu

Discussion on Thermodynamic Formula and the Gas-Liquid Equilibrium Condition for Spherical Droplet

LI Ai-Chang ,
ZHAO Di

Faculty of Chemistry and Material Science, Langfang Teachers University, Langfang 065000, Hebei Province, P. R. China

Thermodynamic formula for the spherical droplet was obtained from the different analysis aspect based on the first/second law of thermodynamic. It should be pointed out that the pressure in formula is liquid pressure, but not gas pressure. According to the entropy and Gibbs free energy criteria, it was proved that the vapor-liquid equilibriumcondition is that the chemical potentials of two bulk phase are equal. It is noted that the phase equilibrium condition can not only be applied for the spherical droplet, but also for others shape droplets, and whether it is isolated system or a closed system and the type. In addition, the relevant problems in the literatures were discussed in detail and some obscure opinions were clarified.
- Spherical droplet,
- Thermodynamic formula,
- Phase equilibrium condition
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