The Gibbs energy change of a process can be negative at constant pressure and temperature

the verdict

SUPPORTED

the evidence backs this

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2 sources for · 0 against

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Is it true that the Gibbs energy change of a process can be negative at constant pressure and temperature?

Yes. Chemical processes and adsorption phenomena frequently exhibit a negative Gibbs energy change at constant temperature and pressure, indicating thermodynamic spontaneity.

Verdict: SUPPORTED · 2 sources for, 0 against · Last checked 4 Aug 2026

The analysis

The claim is a well-established thermodynamic principle stating that processes can have a negative Gibbs energy change under constant temperature and pressure (indicating spontaneity). The retrieved papers (such as papers 1 and 2) explicitly calculate and report negative Gibbs free energy changes for spontaneous adsorption and reaction processes.

Evidence for · 2

Discussion on the thermodynamic calculation and adsorption spontaneity re Ofudje et al. (2023)

2024

The study confirms that a negative Gibbs free energy change indicates spontaneity in adsorption processes.

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Zhou, X., Yu, X., Maimaitiniyazi, R., Zhang, X., & Qu, Q. (2024). Discussion on the thermodynamic calculation and adsorption spontaneity re Ofudje et al. (2023). doi.org. https://doi.org/10.1016/j.heliyon.2024.e28188

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More for · 1

Adsorption and thermodynamic studies of the corrosion Inhibition effect of Desmodium adscendens (Swartz) extract on carbon steel in 2 M HCl

2025

Negative adsorption Gibbs energy values demonstrate the spontaneity of the corrosion inhibitor's process.

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Adamu, A. A., Iyun, O. R. A., & Habila, J. D. (2025). Adsorption and thermodynamic studies of the corrosion Inhibition effect of Desmodium adscendens (Swartz) extract on carbon steel in 2 M HCl. doi.org. https://doi.org/10.1186/s13065-025-01541-y

Related receipts

Is it true that Gibbs standard free energy remains constant at a given temperature? REFUTED related question, same topic
Is it true that the change in Gibbs energy is non-zero when calculated through the standard Gibbs free energy equation? SUPPORTED related question, same topic
Is it true that the mass of an electron changes with its energy state? SUPPORTED related question, same topic

Receipt History

first checked04 Aug 2026

judged → SUPPORTED · 8504 Aug 2026

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