Numerous water characteristics are essentially ascribed to its peculiarity to form strong hydrogen bonds that become progressively more stable on decreasing the temperature. However, the structural and dynamical implications of the molecular rearrangement are still subject of debate and intense studies. In this work, we observe that the thermodynamic characteristics of liquid water are strictly connected to its dynamic characteristics. In particular, we compare the thermal behaviour of the isobaric specific heat of water, measured in different confinement conditions at atmospheric pressure (and evaluated by means of theoretical studies) with its configurational contribution obtained from the values of the measured self-diffusion coefficient through the use of the Adam-Gibbs approach. Our results confirm the existence of a maximum in the specific heat of water at about 225 K and indicate that especially at low temperature the configurational contributions to the entropy are dominant.

Francesco Mallamace, Carmelo Corsaro, Domenico Mallamace, Enza Fazio, Sow-Hsin Chen, Antonio Cupane (2020). Specific Heat and Transport Functions of Water. INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 21(2) [10.3390/ijms21020622].

Specific Heat and Transport Functions of Water

Francesco Mallamace
Membro del Collaboration Group
;
Antonio Cupane
Membro del Collaboration Group
2020-01-01

Abstract

Numerous water characteristics are essentially ascribed to its peculiarity to form strong hydrogen bonds that become progressively more stable on decreasing the temperature. However, the structural and dynamical implications of the molecular rearrangement are still subject of debate and intense studies. In this work, we observe that the thermodynamic characteristics of liquid water are strictly connected to its dynamic characteristics. In particular, we compare the thermal behaviour of the isobaric specific heat of water, measured in different confinement conditions at atmospheric pressure (and evaluated by means of theoretical studies) with its configurational contribution obtained from the values of the measured self-diffusion coefficient through the use of the Adam-Gibbs approach. Our results confirm the existence of a maximum in the specific heat of water at about 225 K and indicate that especially at low temperature the configurational contributions to the entropy are dominant.
Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin)
Francesco Mallamace, Carmelo Corsaro, Domenico Mallamace, Enza Fazio, Sow-Hsin Chen, Antonio Cupane (2020). Specific Heat and Transport Functions of Water. INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, 21(2) [10.3390/ijms21020622].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/393689
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