why?
2007-08-31 19:39:45 · 7 answers · asked by english_improve 3 in Science & Mathematics ➔ Chemistry
Adding salt to water (or ice) lowers the melting point of ice from 32F to about 15F. What this accomplishes is making really cold water. Water conducts heat better that ice since conduction has a lot to do with surface contact. Ice cubes don;t actually make very good contact with the ice cream maker since there is a lot of air between the cubes. Water however, make a great conductor. So, if you can melt the ice and lower the temperature, you can freeze the ice cream while keeping the water from freezing.
2007-08-31 19:51:48 · answer #1 · answered by Lumberjack 3 · 1⤊ 0⤋
We need to put rock salt into ice outside to make icecream because salt lowers the temperature of ice and thus prevents it from melting.
Rock salt : Less refined and grayish in color, this is the chunky crystal salt used in ice cream machines. This type is generally not used as an edible flavoring mixed into foods, but in cooking methods such as to bake potatoes or to encrust or embed meat, seafood or poultry for baking. Rock salt makes an impressive bed for oysters on the half shell. When using rock salt for cooking, be sure it is food-grade. Some rock salt sold for ice cream machines is not suitable for cooking.
2007-08-31 21:31:04 · answer #2 · answered by devyani b 2 · 0⤊ 0⤋
On the basis of Colligative properties (properties of solutions that depend on the number of particles in a given volume of solvent and not on the mass of the particles), there is that certain property where the boiling point is being elevated which reversibly means lowering the melting point of your system (which in ice creams' case ur solvent is the ice and ur solute is the salt)
2007-08-31 19:57:13 · answer #3 · answered by shaims al. 1 · 0⤊ 0⤋
i think of the salt lowers the temperature at which water will freeze. this permits the temperature of the water around the outdoors of the ice cream container to flow decrease in the previous freezing sturdy.
2016-12-12 15:02:28 · answer #4 · answered by Anonymous · 0⤊ 0⤋
To lower the Melting point of Ice.
2007-08-31 19:43:36 · answer #5 · answered by ag_iitkgp 7 · 0⤊ 1⤋
salt absorbs moisture,to make the ice not to melt easily
2007-08-31 19:49:18 · answer #6 · answered by GunzAndRoses 2 · 0⤊ 0⤋
It lowers the melting point, allowing the container to stay colder.
2007-08-31 19:44:40 · answer #7 · answered by Lady Geologist 7 · 0⤊ 0⤋