The enthalpy change is non-zero in an irreversible adiabatic process
Physical and chemical processes, including irreversible thermodynamic transformations, routinely exhibit non-zero enthalpy changes as energy is transferred or converted.
The retrieved literature consistently supports the premise that thermodynamic processes—including non-equilibrium and irreversible ones like phase changes, reactions, and flow heat transfers—involve enthalpy changes that are non-zero.
Zhanyong Zhao, P. Bai, Liang Li, Jing Li, Liyun Wu, Pengchen Huo, L. Tan. The Reaction Thermodynamics during Plating Al on Graphene Process. 2019. https://doi.org/10.3390/ma12020330
Studies demonstrating measurable enthalpy changes during chemical and phase processes confirm that thermodynamic systems undergo non-zero enthalpy variations.
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M. Pecchi, F. Patuzzi, V. Benedetti, R. Maggio, M. Baratieri. Thermodynamics of hydrothermal carbonization: Assessment of the heat release profile and process enthalpy change. 2020. https://doi.org/10.1016/j.fuproc.2019.106206
Experimental analyses of hydrothermal carbonization processes determine specific non-zero enthalpy changes associated with thermal transformations.
Rainer Feistel, Olaf Hellmuth. Irreversible Thermodynamics of Seawater Evaporation. 2024. https://doi.org/10.20944/preprints202309.1744.v1
Research into non-equilibrium and irreversible processes, such as seawater evaporation, tracks associated non-zero changes in enthalpy and entropy.
Liu Y, Jia Y, Liu Y. Influence of Thermal Inertia on Dynamic Characteristics of Gas Turbine Impeller Components.. 2025. https://doi.org/10.3390/e27070711
Investigations into the operational dynamics of turbine components record non-zero enthalpy variations as heat is exchanged and converted into work.
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