The Advanced Photon Source
a U.S. Department of Energy Office of Science User Facility

NST Colloquium: Anomalies in Ambient and Supercooled Water: Is There a Second Critical Point Lurking Nearby?

Type Of Event
Colloquium
Location
440/A105-A106
Building Number
440
Room Number
A105-A106
Speaker
James Skinner, University of Chicago
Start Date
10-16-2019
Start Time
11:00 a.m.
Description

Abstract:
Liquid water displays a number of anomalies, including the famous density maximum at 4 C and the compressibility minimum at 46 C.  Moreover, the density decreases markedly and the compressibility increases rapidly as the temperature is further decreased below 0 C and the liquid becomes supercooled.  Finally, the density decrease upon freezing is also anomalous.   In this talk I will explore possible microscopic and thermodynamic origins of these anomalies, present experimental, simulation, and theoretical evidence for the presence of a liquid-liquid critical point in deeply supercooled water, and argue that this critical point, even though far removed in temperature and pressure from ambient water, is nonetheless responsible for its anomalies.

 

10.01.2019

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