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Citation: Kai Ye, Lizhong Zhang, Mingyu Zhang, Qinxiong Wu, Kui Wang, Qi Wang. Digital Experiment for the Determination of Liquid Saturated Vapor Pressure[J]. University Chemistry, ;2026, 41(1): 227-243. doi: 10.12461/PKU.DXHX202503107 shu

Digital Experiment for the Determination of Liquid Saturated Vapor Pressure

College of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, China

Corresponding author: Kui Wang, Qi Wang,
Received Date: 26 March 2025
Revised Date: 16 September 2025

The determination of liquid saturated vapor pressure is a key component of undergraduate physical chemistry laboratory instruction, facilitating students’ systematic understanding of material properties and phase-transition behavior. However, the conventional dynamic method suffers from cumbersome operation, substantial experimental error, limited openness, and safety concerns. The proposed digital laboratory scheme integrates a proportional-integral-derivative (PID)-based automated control system with a web-based virtual laboratory platform and applies machine learning for in-depth analysis of experimental data, thereby providing a safe, efficient, and precise instructional environment. Empirical results show that the mean relative measurement error is reduced from the traditional 8.7% to 0.5%, the instructional cycle is shortened from more than one week to within a week, the temperature measurement error is controlled within ±0.5 °C, and the pressure error within ±0.2 kPa. This approach optimizes conventional teaching practices and effectively remedies deficiencies in current experimental instruction.
- Saturated vapor pressure,
- Digitalization,
- Automatic control,
- Web laboratory,
- Machine learning
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