Call number:
ZSP-201-76/20
In:
CRREL Report, 76-20
Description / Table of Contents:
Under ordinary conditions the freezing of water begins with supercooling and ice nucleation, and proceeds at 0°C at the ice/water interface until ice formation stops. The presence of solutes, high pressure, or dispersal in fine pores causes the water to freeze at temperatures below 0°C (the so-called freezing point depression). Whenever freezing begins, it proceeds at a constant temperature, or at a temperature which becomes progressively lower. A temperature rise during ice formation is considered here to be an anomaly. Under all equal circumstances, the conditions under which an anomalous freezing temperature is observable appear to be very special. This report describes two different experiments displaying the anomalous rise of temperature after nucleation and during ice formation. In one case the water was dispersed in the fine pores of fine powders; in the other case pure water was frozen in a transparent insulated cell. Photographic observations were made; relations of ice surface to water volume were measured.
Type of Medium:
Series available for loan
Pages:
iv, 23 Seiten
,
Illustrationen
Series Statement:
CRREL Report 76-20
URL:
https://cdm16021.contentdm.oclc.org/digital/collection/p266001coll1/id/6198
Language:
English
Note:
CONTENTS
Page
Abstract
Preface
Conversion factors for U.S.customary and SI units
Introduction
Materials, instruments, measurements
Experiments with water freezing in fine pores
Freezing experiments with bulk water
Summary and conclusions
Literature cited
Location:
AWI Archive
Branch Library:
AWI Library
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