Measuring the configurational heat capacity of liquids

Li Min Wang, Ranko Richert

Research output: Contribution to journalArticlepeer-review

98 Scopus citations


A high electric field impedance experiment on supercooled molecular liquids is employed to transfer energy to the slow modes by absorption from the field and detect the increase of their "configurational temperature", Tcfg, via the change of the relaxation times. This allows us to determine the configurational heat capacity, which accounts for most of the excess heat capacity for stronger liquids, but for only half of the heat capacity step in the case of more fragile systems. It is also observed that Tcfg gradually approaches the phonon temperature on the structural relaxation time scale.

Original languageEnglish (US)
Article number185701
JournalPhysical Review Letters
Issue number18
StatePublished - Oct 31 2007

ASJC Scopus subject areas

  • General Physics and Astronomy


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