how does adding salt water affect the way water changes tempeture? snd how does it affect the freezing point?

Question

GO Stonecold

Answer 1

Under normal conditions, ordinary water freezes at 0°C, or 32°F. However, if you add salt to water, its freezing point becomes lower. Technically, salt water does not freeze. The icebergs in the oceans have been tested extensively and they are only chemically composed of water and air pockets. The salt tends to shift to the outside edge of the berg. The salt can actually be scraped off the edges of the giant ice block. So for all technical purposes the frozen substance is actually just water and nothing more. The freezing point of the ocean water is considerably higher then that of plain H2O.

Answer 2

Adding salt, (an impurity) to water results in the salt Na Cl dissolving and breaking down to Na++ and Cl-- ions. The sodium, a metal, increases the density of the water and will retard the rate of heat loss or heat gain as you try to change the temperature of the water. For the same reason, it lowers the freezing point because it retains some heat value.

Answer 3

Salt Water freezes at a lower temperature and it boils at a lower temperature as well. However the changes are minor ones.

According to Wikipedia: http://en.wikipedia.org/wiki/Boiling
"Adding a water soluble substance, such as salt or sugar also increases the boiling point. This is called boiling-point elevation. However, the effect is very small, and the boiling point will be increased by an insignificant amount."

Adding salt to water causes a lot of changes.

To freeze salt water the temperature has to be several degrees below zero degrees C. According to Wikipedia: http://en.wikipedia.org/wiki/Sea_ice
The temperature has to be below -1.8 degrees C.

Salt Water is denser than freshwater so the speed of sound traveling in salt water is higher than it is in fresh water (http://en.wikipedia.org/wiki/Seawater).

According to Wikipedia: http://en.wikipedia.org/wiki/Salinity
"The salt content of most natural lakes, rivers, and streams is so small that these waters are termed fresh or even sweet water. The actual amount of salt in fresh water is, by definition, less than 0.05%. Otherwise, the water is regarded as brackish, or defined as saline if it contains 3 to 5% salt by weight. At well over 5% it is considered brine. The ocean is naturally saline at approximately 3.5% salt (see sea water). Some inland salt lakes or seas are even saltier. The Dead Sea, for example, has a surface water salt content of around 30%."

Answer 4

The salt ionizes into Na+ and Cl- ions and interfere with the reaction's equilibrium point at 0 degrees Celsius (yes freezing is a reaction). This is because these ions interfere with the hydrogen bond crystal structure to make ice.

Answer 5

hmm...salt water is more dense