HR: 1340h
AN: A13B-1171    [Abstracts]
TI: The Vapor Pressure of Supercooled Water Measured Using Infrared Spectroscopy
AU: * Cantrell, W
EM: cantrell@mtu.edu
AF: Dept. of Physics, Michigan Technological Unversity 1400 Townsend Dr., Houghton, MI 49931,
AU: Ochshorn, E
EM: ekochsho@mtu.edu
AF: Dept. of Physics, Michigan Technological Unversity 1400 Townsend Dr., Houghton, MI 49931,
AU: Kostinski, A
EM: kostinsk@mtu.edu
AF: Dept. of Physics, Michigan Technological Unversity 1400 Townsend Dr., Houghton, MI 49931,
AU: Bozin, K
EM: kbozin@comcast.net
AF: Lawrence Technological University, 21000 West Ten Mile Road, Southfield, MI 48075,
AB: We present measurements of the vapor pressure of supercooled water utilizing infrared spectroscopy, which enables us to verify unambiguously the fact that our data correspond to the vapor pressure of liquid water, not a mixture of liquid water and ice. Our values of the vapor pressure and derived value of the latent heat of vaporization are in agreement with previous work. Below -13 °C, the water film which we monitor to determine coexistence of liquid water (at one temperature) and ice (at another, higher, temperature) de-wets from the hydrophilic silicon prism employed in our apparatus. The de-wetting transition indicates a quantitative change in the structure of the supercooled liquid.
DE: 0320 Cloud physics and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting