TERMIUM Plus®

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ICE MELTING POINT [8 records]

Record 1 2013-04-29

English

Subject field(s)
  • Glaciology
DEF

Glacier ice which is well beneath its pressure melting point, resulting in the absence of melt water.

French

Domaine(s)
  • Glaciologie

Spanish

Save record 1

Record 2 2012-02-20

English

Subject field(s)
  • Atmospheric Physics
  • Hydrology and Hydrography
DEF

The temperature at which a mixture of air-saturated pure water and pure ice may exist in equilibrium at a pressure of one standard atmosphere.

OBS

The ice point is frequently called the freezing point, but the latter term should be reserved for the much broader reference to the solidification of any kind of liquid under various conditions.

OBS

For pure-water substance the [freezing point] temperature is 0°C and is termed the "ice-point". In meteorology, the term "freezing-point" is often used to signify "ice-point". In practice, a cooling liquid may not freeze at the freezing-point because of a pressure variation from standard atmospheric pressure, or the presence of impurities, or the phenomenon of supercooling.

French

Domaine(s)
  • Physique de l'atmosphère
  • Hydrologie et hydrographie
DEF

Vrai point de congélation de l'eau; température à laquelle un mélange d'eau pure saturée d'air et de glace pure en équilibre existe à la pression d'une atmosphère type.

CONT

Sous une pression normale, la température du point de fusion de la glace pure est prise comme référence du 0° de l'échelle thermométrique Celsius.

OBS

Il ne faut pas confondre le point de glace avec le point de givre ou avec le point de gelée blanche.

Spanish

Campo(s) temático(s)
  • Física de la atmósfera
  • Hidrología e hidrografía
DEF

El punto de congelación verdadero; la temperatura a la cual una mezcla constituida por agua pura saturada de aire y por hielo puro presenta un estado de equilibrio a la presión de una atmósfera estándar.

Save record 2

Record 3 2011-07-05

English

Subject field(s)
  • Chemical Engineering
  • Freezing and Refrigerating
DEF

A salt mixture added to crushed ice to lower its melting point.

Key term(s)
  • freezing compound

French

Domaine(s)
  • Génie chimique
  • Congélation, surgélation et réfrigération
DEF

Mélange de sels que l'on ajoute à la glace broyée pour en abaisser le point de fusion.

Spanish

Save record 3

Record 4 2011-06-21

English

Subject field(s)
  • Scientific Measurements and Analyses
  • Physics of Solids
DEF

The temperature at which [the] crystals [of a pure substance] are in equilibrium with the liquid phase at atmospheric pressure.

CONT

The melting point of a substance should be considered a property of its crystalline form only. At the melting point the liquid and solid forms of a substance exist in equilibrium. All substances of crystalline nature have their characteristic melting points. For very pure substances the temperature range over which the process of fusion occurs is very small. The melting point of a pure crystalline solid is a function of pressure; it increases with increasing pressure for most substances. However, in the case of ice(and a few other substances) the melting point decreases with increasing pressure... Under a pressure of one standard atmosphere, the melting point of pure ice is the same as the ice point, that is, 0°C.

OBS

The melting point is the temperature at which a solid material becomes liquid. The freezing point is the temperature at which liquid material becomes a solid.

OBS

The term "melting point"(mp) is used when the equilibrium temperature is approached by heating the solid. Ordinarily refers to temperature above 0°C, the melting point of ice.

OBS

... melting point and freezing point are often used interchangeably depending on whether the substance is being heated or cooled.

French

Domaine(s)
  • Mesures et analyse (Sciences)
  • Physique des solides
DEF

Température à laquelle, sous une certaine pression, le solide et le liquide sont en équilibre.

OBS

L'abréviation Tf est utilisée dans les cahiers de la collection Enviroguide d'Environnement Canada.

Spanish

Campo(s) temático(s)
  • Medición y análisis (Ciencias)
  • Física de los sólidos
DEF

Para una sustancia, la temperatura correspondiente al paso de la fase sólida a la líquida.

OBS

Es función de la presión.

Save record 4

Record 5 2010-03-03

English

Subject field(s)
  • Glaciology
DEF

The sliding of a glacier on its bed.

CONT

The difference between observed and calculated creep velocities is accounted for by basal sliding (Us) ... and in many glaciers U[subscripts] may be the dominant term in ice flow accounting for up to 90% of the motion.

OBS

[This phenomenon] is the result of a glacier reaching its melting point at its base. It accounts for 90% of the glacier's total movement and is responsible for erosion at the ice-rock interface on the beds of glaciers and ice sheets.

OBS

basal slip: term used at Natural Resources Canada - Earth Sciences Sector.

French

Domaine(s)
  • Glaciologie
DEF

Gisement d'un glacier sur son lit.

OBS

Phénomène qui compte pour 20 à 90 % de l'écoulement total d'un glacier. Caractéristiques de glaciers dits tempérés qui se trouvent dans des conditions de pression et de température telles qu'au moins la base du glacier est proche de l'état de fusion. Donc, une couche d'eau apparaît à la base du glacier quand ce dernier se bute à des obstacles mineurs qui font varier la pression et amènent l'écoulement du glacier.

OBS

glissement basal : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 5

Record 6 2010-03-03

English

Subject field(s)
  • Glaciology
  • Geomorphology and Geomorphogeny
DEF

Solidification or refreezing which is experienced by ice close to its melting point following melting induced by sufficient pressure.

CONT

At least part of the movement probably takes place by regelation around small irregularities in the bedrock floor. The increased pressure on the onset side of any protuberance leads to local melting. The water then flows to the lee side where it refreezes under conditions of diminished pressure.

French

Domaine(s)
  • Glaciologie
  • Géomorphologie et géomorphogénie
DEF

Phénomène [...] consistant pour la glace qui a fondu sous l'action d'une pression, à se reformer aussitôt que cette pression cesse.

CONT

L'eau de fonte descendant dans la neige froide, la réchauffe jusqu'au point de fusion, grâce aux calories que libère son regel partiel. Les grains grossissent, la neige augmente de densité et évolue vers le névé.

Spanish

Save record 6

Record 7 2003-10-28

English

Subject field(s)
  • Chemistry
  • Thermodynamics
  • Glaciology
  • Fluid Mechanics and Hydraulics (Physics)
DEF

The temperature at which a liquid solidifies under the influence of a particular set of conditions.

OBS

It may or may not be the same as the melting point or the more rigidly defined true freezing point or(for water) ice point. It is not an "equilibrium" property of a substance; it applies to the liquid phase only. The freezing point is somewhat dependent upon : the "purity" of the liquid; the volume and shape of the liquid mass; the availability of freezing nuclei; and the pressure acting upon the liquid.

French

Domaine(s)
  • Chimie
  • Thermodynamique
  • Glaciologie
  • Mécanique des fluides et hydraulique (Physique)
DEF

Température de solidification d'un liquide dans des conditions données.

OBS

Ne pas confondre avec le point de gelée blanche et le point de glace.

Spanish

Campo(s) temático(s)
  • Química
  • Termodinámica
  • Glaciología
  • Mecánica de fluidos e hidráulica (Física)
DEF

Temperatura de solidificación de un líquido en condiciones determinadas.

CONT

Construir un diagrama eutéctico simple en un equilibrio sólido-liquido. Efectuar el análisis térmico de las curvas de enfriamiento y los sistemas eutécticos simples. Construir los diagramas de temperatura de congelación en formación de compuesto. Graficar diagramas de soluciones sólidas y determinar su elevación de su temperatura de solidificación.

OBS

Esta información es importante porque un material congelado puede reventar el recipiente donde está contenido o los peligros pueden cambiar.

Save record 7

Record 8 1999-05-14

English

Subject field(s)
  • Atmospheric, Climatic and Meteorological Phenomena
  • Hydrology and Hydrography
  • Climatology
DEF

The change of state from a solid to a liquid at the same temperature.

OBS

The heat of fusion is the number of gram calories of heat necessary to change one gram of a substance from the solid to the liquid state. It is the opposite of freezing.

OBS

Fusion is almost always understood to refer to ice melting, which generally takes place at the ice point of 0°C or 32°F.

French

Domaine(s)
  • Phénomènes météorologiques, climatiques et atmosphériques
  • Hydrologie et hydrographie
  • Climatologie
DEF

Passage de l'état solide à l'état liquide. (Le phénomène inverse est la solidification ou congélation). La fusion franche des corps purs cristallisés a lieu à température et pression constantes.

Spanish

Save record 8

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