Experimental Investigation of Ideal Gas Behavior Using Real-Time Data Logger System
Upik Rahma Fitri1*, Ferdi Azhar Mauludi1, Nur Siffa1, Mira Ziveria2 , Ganis Fia Kartika3 and Andry Fitrian4

1 Department of Physics Education, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, Indonesia
2 Department of Information System, Kalbis University, Jl. Pulomas Selatan, Jakarta 13210, Indonesia
3 Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
4 Department of Physics Education, Universitas Indraprasta PGRI, Jl. Nangka Raya, Jakarta 12530, Indonesia

Abstract

Understanding ideal gas macroscopic behavior is often constrained by conventional laboratory instruments with low temporal resolution and parallax errors. This study evaluates the reliability of a real-time data logger system in verifying the thermodynamic characteristics of gases under isothermal (Boyles Law) and isochoric (Gay-Lussacs Law) conditions. The apparatus integrates a data logger station with a digital barometer and a thermocouple probe. Quantitative analysis employed linear regression and uncertainty evaluation based on the Guide to the Expression of Uncertainty in Measurement (GUM) framework. For Boyles Law verification, the experimental data yielded an average constant of 20286 hPa mL with a relative uncertainty (RU) of 0.355%. Linear regression between pressure and reciprocal volume produced a coefficient of determination approaching unity, indicating excellent agreement with the theoretical prediction. Meanwhile, Gay-Lussacs Law testing yielded an average P/T constant of 3.30128 hPa/K with an RU of 1.541% and a coefficient of determination of 0.99. The low uncertainty values and high linearity obtained under both experimental conditions indicate that the developed instrumentation provides stable and reliable real-time measurements of thermodynamic variables. These findings demonstrate the suitability of the data logger system for quantitative investigations of gas behavior under controlled laboratory conditions.

Keywords: Ideal Gas- Real Gas- Data Logger- Boyle^s Law- Gay-Lussac^s Law- GUM Methodology

Topic: Applied Technology in Physics