Showing 21 - 40 results of 77 for search '"Gibbs free energy"', query time: 0.07s Refine Results
  1. 21

    Special N-dimensional charged anti-de-Sitter black holes in f(Q) gravitational theory by G.G.L. Nashed

    Published 2025-02-01
    “…Finally, we calculate thermodynamic parameters, including entropy, Hawking temperature, and Gibbs free energy. These calculations confirm the stability of our model.…”
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  2. 22

    Natural Polymer of Iraqi Apricot Tree Gum as a Novel Corrosion Inhibitor for Mild Steel in 1 M HCl Solution by I. M. Alwaan, Fouad Kadhim Mahdi

    Published 2016-01-01
    “…The activation energy of adsorption, enthalpy of adsorption, and entropy of adsorption were obtained for different concentrations of natural polymer (0, 0.1, 0.2, and 0.3 g/L) and the results showed that the thermodynamic properties decreased with the loading of a natural polymer. Gibbs free energy of adsorption results was a minus value that led to the conclusion of the spontaneous adsorption of the natural polymer in this system.…”
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  3. 23

    Thermodynamic Insights into the Separation of Carotenoids in Reversed-Phase Liquid Chromatography by Nicola Marchetti, Pier Paolo Giovannini, Martina Catani, Luisa Pasti, Alberto Cavazzini

    Published 2019-01-01
    “…Traditional Van’t Hoff analysis has been used to estimate changes of standard enthalpy (ΔH∘) and Gibbs free energy (ΔG∘) associated with the solute transfer from the mobile to the stationary phase at each mobile phase composition. …”
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  4. 24

    Spectroscopic, Electrochemical, and In Silico Characterization of Complex Formed between 2-Ferrocenylbenzoic Acid and DNA by Ataf Ali Altaf, Bhajan Lal, Nasir Khan, Amin Badshah, Shafiq Ullah, Kamran Akbar

    Published 2016-01-01
    “…The binding constant (Kb) and Gibbs free energy (ΔG) for the FcOH-DNA complex have been estimated as 5.3 × 104 M−1 and −6.44 kcal/mol, respectively. …”
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  5. 25

    Interfacial and Micellization Behavior of Cetyltrimethylammonium Bromide (CTAB) in Water and Methanol-Water Mixture at 298.15 to 323.15 K by Sujit Kumar Shah, Ajaya Bhattarai

    Published 2020-01-01
    “…The effect of methanol on values of critical micelle concentration (cmc), free energies of micellization ΔGmo, and surface properties viz. maximum surface excess concentration Γmax, area occupied by per surfactant molecule Amin, surface pressure πcmc, solution surface tension γcmc, solvent surface tension (γo), free energies of adsorption ΔGadso, the efficiency of adsorption (pC20), effective Gibbs free energy ΔGeffo, and free energy of surface at equilibrium (Gmin) were investigated using surface tension values. …”
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  6. 26

    Temperature and composition dependence of viscosity, refractive index and thermodynamics of viscous flow for benzonitrile + methyl/ethyl/butyl methacrylate binary systems: Experime... by Anil Kumar Nain, Preeti Droliya

    Published 2025-03-01
    “…Additionally, the thermodynamic parameters, Arrhenius activation energy and Gibbs free energy, enthalpy and entropy of activation of viscous flow have also been calculated and analyzed to describe the thermodynamics of viscous behaviour of these systems. …”
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  7. 27

    Thermodynamic Analysis of Steam Gasification for Syngas Production in Biomass Renewable Energy Using Parametric Investigation by Ziyu Wang, Charalampos Baniotopoulos

    Published 2023-09-01
    “…Therefore, it is converted into syngas using processes such as gasification. Gibbs free energy minimization approach is used in this investigation. …”
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  8. 28

    Hydrogenotrophic methanogenesis at 7–12 mbar by Methanosarcina barkeri under simulated martian atmospheric conditions by Rachel L. Harris, Andrew C. Schuerger

    Published 2025-01-01
    “…Notably, CH4 production scaled with the partial pressure of H2, revealing that hydrogen uptake affinity is a stronger predictor of habitability and methanogenic potential than favorable Gibbs free energy of reaction. Our findings suggest that Mars’ subsurface could harbor habitable refugia capable of supporting methanogenesis, sustaining microbial life at low metabolic steady states. …”
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  9. 29

    Computational Study of Some Urolithin Derivatives-based Biomass Corrosion Inhibitors on the Fe (110), Cu(111) and Al(111) Surface by Rebaz A. Omer

    Published 2025-02-01
    “…Thermal characteristics, particularly Gibbs free energy, were also investigated. The results suggest that a temperature increase from 825 to 1000 K may induce a transition from physisorption to chemisorption for all chemicals on the metal surface. …”
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  10. 30

    Green Synthesis of S- and N-Codoped Carbon Nanospheres and Application as Adsorbent of Pb (II) from Aqueous Solution by Nadia Hussain, Salam Alwan, Hassan Alshamsi, Ibrahim Sahib

    Published 2020-01-01
    “…The thermodynamic parameters including Gibbs free energy (ΔG°), standard enthalpy change (ΔH°), and standard entropy change (ΔS°) were calculated for the adsorption process.…”
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  11. 31

    Thermochemical Equilibrium Model of Synthetic Natural Gas Production from Coal Gasification Using Aspen Plus by Rolando Barrera, Carlos Salazar, Juan F. Pérez

    Published 2014-01-01
    “…In this work, the process to produce SNG by means of coal-entrained flow gasifiers is modeled under thermochemical equilibrium with the Gibbs free energy approach. The model was developed using a complete and comprehensive Aspen Plus model. …”
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  12. 32

    Heat Capacity and Thermodynamic Property of Cesium Tetraborate Pentahydrate by Kangrui Sun, Kaiyu Zhao, Long Li, Yafei Guo, Tianlong Deng

    Published 2019-01-01
    “…The molar heat capacity of cesium tetraborate pentahydrate is fitted as Cp,m (J·mol−1·K−1) = 593.85705 + 48.0694[T − (Tmax + Tmin)/2]/(Tmax − Tmin)/2] + 24.86395[(T − (Tmax + Tmin)/2)/(Tmax − Tmin)/2]2 + 0.53077[(T − (Tmax + Tmin)/2)/(Tmax − Tmin)/2]3, and the relevant thermodynamic functions of enthalpy, entropy, and Gibbs free energy of cesium tetraborate pentahydrate are also obtained at intervals of 2 K from 303 to 349 K.…”
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  13. 33

    Removal of Congo Red by Silver Carp (Hypophthalmichthys molitrix) Fish Bone Powder: Kinetics, Equilibrium, and Thermodynamic Study by Shahanaz Parvin, Md. Manjur Hussain, Farhana Akter, Biplob Kumar Biswas

    Published 2021-01-01
    “…The increasing negative value of Gibbs free energy (ΔG) with temperature rise indicated spontaneous nature and feasibility of adsorption. …”
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  14. 34

    Kinetics of oil palm empty fruit bunch fiber pyrolysis by Bashar Abdullahi Hadi, Abdullahi Muhammad Sokoto, Aminu Bayawa Muhammad, Yahaya Alhassan, Chika Muhammad

    Published 2024-03-01
    “…The changes in entropy (−123 to 135), Gibbs free energy (150–156 kJ/mol), and activation enthalpy (63–71 kJ/mol) were computed using the best-fitting model. …”
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  15. 35

    Ultrasonic Speed and Related Acoustical Parameters of 1,1ʼ-Binaphthalene-2,2ʼ-diyl Diacetate Solutions at 308.15 K by Pooja P. Adroja, S. P. Gami, J. P. Patel, P. H. Parsania

    Published 2011-01-01
    “…A fairly constant Gibbs free energy of activation has been observed in all the solvent systems studied.…”
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  16. 36

    Estimation of viscosity for some silicate ternary slags by Shu Q., Wang L., Chou K.C.

    Published 2014-01-01
    “…According to modified KTH model, viscous Gibbs free energy for mixing of ternary slags was estimated by employing general solution model. …”
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  17. 37

    Heat Capacity and Thermodynamic Properties of Cesium Pentaborate Tetrahydrate by Kangrui Sun, Panpan Li, Long Li, Yafei Guo, Tianlong Deng

    Published 2020-01-01
    “…The relevant thermodynamic functions of enthalpy (HT − H298.15), entropy (ST − S298.15), and Gibbs free energy (GT − G298.15) of cesium pentaborate tetrahydrate from 298 to 375 K of 5 K intervals are also obtained on the basis of relational expression equations between thermodynamic functions and the molar heat capacity.…”
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  18. 38

    Conductometric, physico-chemical, and biological activity investigations of a copper–indometacin complex by AbdulAziz A. Alayyafi, Kholoud Z. Ghanem, Modhi S. Almarri, Shereen E. Salem, Esam A. Gomaa, Elsayed M. AbouElleef

    Published 2025-12-01
    “…Three stoichiometric complexes of copper–indometacin (1/2), (1/1), and (2/1) (M/L) were detected and their formation constants (Kf) were estimated by using the conductometric method and the Gibbs free energy change (ΔGf) was also estimated. The antimicrobial activities of indometacin and (Cu-Indo) complex have been studied using the disc diffusion method against Gram-negative bacteria (P. aeruginosa, E. coli, and K. pneumoniae), Gram-positive bacteria (S. aureus, B. cereus, and S. epidermidis), and fungi (C. albicans). …”
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  19. 39

    Adsorption Behaviors of Oxytetracycline onto Sediment in the Weihe River, Shaanxi, China by Dong-Hui Cheng, Sheng-Ke Yang, Yue Zhao, Jing Chen

    Published 2013-01-01
    “…Thermodynamics parameters such as Gibbs-free energy change (ΔG°), enthalpy change (ΔH°), and entropy change (ΔS°) were calculated. …”
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  20. 40

    Kinetics and Thermodynamics of Oil Extraction from Jatropha curcas L. Using Ethanol as a Solvent by Silmara Bispo dos Santos, Marcio Arêdes Martins, Ana Lívia Caneschi, Paulo Rafael Morette Aguilar, Jane Sélia dos Reis Coimbra

    Published 2015-01-01
    “…Values obtained for the variation in Gibbs free energy showed that the extraction process using ethanol as a solvent is spontaneous and thermodynamically favorable for the moisture content of 0%, where the smaller the average particle size the greater the spontaneity of the process.…”
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