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What makes the soda cool faster?
Answer 1:

Soda, like any substance can be cooled by coming into contact with materials that are colder than it. In a refrigerator, this might be the cold air inside, or when you add an ice cube, it would be the cold ice. The soda will cool down (and the other material will heat up) until both materials are at the same temperature. This does not depend on what is cooling the soda down.

The question of "what makes it cool down faster?" deals with cooling rate and heat transfer. The three simple answers are:
1) The temperature of the other material (the bigger the difference in temp, the faster it will cool)
2) The surface area of the soda (large contact surface area leads to faster cooling)
3) The properties of the other material (solids/liquids cool things down faster than gasses)

Thus the fastest way to cool down a can of soda would be to put it into a long skinny can (higher surface area) and drop it into a large bath of liquid nitrogen (temp = -330 degress). [Of course this is something we should not do under any circumstance - this could be very dangerous!! and would cause the soda to freeze, popping the can]

But, if you want soda cooled quickly, say in a cooler when you go to the beach, rather than use just ice, adding a little water to the ice will increase the surface area in contact with the can. Adding salt to the ice water will also decrease the temperature. Thus, salty ice water is the fastest reasonable way to cool soda.

Not sure if this answers your question, but hopefully it helps!



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