temperature & salt?

Question

In a activity to test the temperature of water freezing to ice must added salt.Teacher says salt were decrease the temperature.But how it decrease the temperature of a liquid?

Answer 1

resolving anything in water will decrease the temperatur.
Because for resolving energy is needed, this is pulled out of the water, and thus the temperature of the water drops.

Answer 2

Hi. Equal volumes of ICE and salt will achieve 0 deg F. This is how 0 deg F was established. The salt melts the ice causing it to absorb heat (the same thing as cooling). Just for reference, the human body was first used to establish 100 deg F, then the system was changed to use boiling water at normal pressure, 212 deg F.

Answer 3

Salt does not decrease the temperature of water. However salt water does not freeze at 32 degrees.
The more salt in the water the colder it has to be to freeze.
Also, frozen salt water is less brittle than frozen fresh water so it does not break as easily.

Answer 4

Adding salt to a liquid makes it freeze at a cooler temperature. For instance, water freezes at 0c, but a substantial bit cooler when salt is added.

Answer 5

The separation of substances is on experiments.Salt(table) dissolves uniformly in water.Heat=(heat capacity).temperature change.

Answer 6

this is because of depression in freezing pt. if u add a non-volatile solvent ( one which doesn't evaporate) to a solution in this case water. its colligative properties of solution.