A Conversation for Why We Slip On Ice

slipping on ice

Post 1


Why does salt melt ice? and does the slipping effect increase or decrease when used

slipping on ice

Post 2

The H2G2 Editors

Again, very good question. Can we suggest you Ask h2g2? It's a very popular thread where you can ask all sorts of questions and usually get some good answers: http://www.bbc.co.uk/dna/h2g2/brunel/A148907 Oh and welcome to h2g2!smiley - ok

slipping on ice

Post 3


Salt lowers the freezing point of the water because it's an impurity, so the ice melts. If the temperature is too cold, however, the water still freezes because it is still below the new freezing point of water.

slipping on ice

Post 4

Frank Barone

Ice has unique properties. Hydrogen bonding means that it expands when it freezes so the solid (ice) floats on the liquid (water). No other substance does this (I think).
If you put pressure on ice the molecules get broken and a liquid forms (it is not because the ice has warmed up). As soon as you take the pressure off the liquid goes back to ice.

Putting salt on ice breaks the bonds and forms a liquid. An ice/salt mixture is colder than 0C (zero Celsius). The ice does not melt because it warms up. Years ago scientists used ice/salt mixtures to obtain low temperatures.
Further topics to look up; thermometry, Fahrenheit.

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