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Gritt on the streets

Nicole

Type	Document
{:title=>"Description"}	A common misconception is that gritting the sidewalk causes the temperature to increase and thus melt the ice. However, it is actually the other way around. Adding salt to a water-ice mixture lowers the freezing point of the solution, causing the ice to become liquid even though the temperature is below 0ºC. This is the reason why we put grit on the streets and one of the reasons why ice rarel...
Tags	Phase transitions salt water freezing point boiling condensation.
Author	TEMI group
Uploaded by	Nicole
License	Creative Commons Attribution-NonCommercial
Attribute to	http://teachingmysteries.eu/en/about/?t=1

Language	Language independent
Publication créée à	mardi 24 mai 2016 10:27
Publication mise à jour à	mardi 24 mai 2016 10:27
Size	910 ko

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• Type: Document
• Title: Gritt on the streets
• Description: A common misconception is that gritting the sidewalk causes the temperature to increase and thus melt the ice. However, it is actually the other way around. Adding salt to a water-ice mixture lowers the freezing point of the solution, causing the ice to become liquid even though the temperature is below 0ºC. This is the reason why we put grit on the streets and one of the reasons why ice rarely forms in oceans in temperate climates.
• Keywords: Phase, transitions, salt, water, freezing, point, boiling, condensation.
• Language: Language independent
• Age Range: 11 - 18
• Author: TEMI group
• Uploaded by: Nicole
• License: Creative Commons Attribution-NonCommercial
• LOM Metadata: http://vishub.org/activity_objects/27449/metadata.xml

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