MadSci Network: Chemistry

Subject: Temp of ice before and after adding salt...

Date: Mon Jan 24 21:59:15 2000
Posted by Jill I
Grade level: K-3 School: Lowell Elementary
City: Wheaton State/Province: IL Country: USA
Area of science: Chemistry
ID: 948772755.Ch

I am working on a project with a thrid grade class.  The students had a 
cup that contained a small amount (say 1/4 cup) of ice chips and measured 
the tempurature of the ice.  The readings of the students varied between 
40 and 33 degrees F.  After the addition of the salt, the temperatures 
drastically decreased.  On my own sample, before the salt the temp was 32 
degrees F and after the salt was added, the temp I recorded was 20 degrees 
F.  How can one explain the decrease in the overall temperature of the 

Re: Temp of ice before and after adding salt...

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