Can you lower the temperature of a warm swimming pool by adding dry ice to the water?
Sure, but it will take a lot of dry ice to make a noticeable difference in the temperature. The amount required would depend on how much water is in the pool and how much you want to cool it, but for anything larger than an inflatable kiddy pool it'll take a lot of dry ice.
Salt water has a lower freezing point that plain water. Adding salt to ice will lower the freezing point of the ice and effectively melt the ice, at least down to a certain temperature. Notes seem to indicate that the minimum temperature for a saltwater solution is -21.1°C, below which adding salt to the ice would be ineffective.
Adding a salt to a pure substance depresses the melting point and elevates the boiling point. Adding salt to water will enable it to stay liquid at a lower temperature than 0 oC; adding salt to ice will drop its temperature (this phenomenon was used in old fashioned ice cream makers); adding salt to water will make it boil at a temperature higher than 100 oC
When any mineral is added to water, its freezing point is lowered. The higher the concentration of the mineral, the more the freezing point is lowered. Salt water has a lower freezing point that plain water. Adding salt to ice will lower the freezing point of the ice and effectively melt the ice, at least down to a certain temperature. Notes seem to indicate that the minimum temperature for a saltwater solution is -21.1°C, below…
when ever the cold water is added to hot water, there exist a temperature difference between the molecules of hot water and cold water, always the teperature flows from higher temperature bodies to lower one that's why, the cold water molecules gain some heat from hotter molecules due to this the temperature of hot water reduces
No. Carbonated will melt in a shorter time than water. Carbonated drinks have dissolved carbonic acid in them, which will lower the freezing point. (This is similar to how adding salt to ice makes it melt at a lower temperature.) So, if two solutions are frozen at the same temperature and then thawed at the same temperature, the carbonated drink will melt first.
Adding salt to ice water does make it colder. It lowers the freezing point of the water making the mixture colder. The ice will melt more slowly because the water's freezing and melting points have been depressed by the addition of the solvent salt. Adding the salt does not by itself lower the temperature of the water, it simply lowers the freezing point of the water.
I mean like this is basic Earth Science, so my explanation will be short. Umm... so let me get to the point. A swimming pool is filled with water, right? And cement around it is considered land, right? So, the specific heat of land is much lower than the specific heat of water. This means that it takes much more energy, temperature and time, to increase the temperature of water. Whereas, lands specific heat is…
Adding impurities to a compound generally lowers the melting point. Therefore, adding salt (an impurity) to water will lower its melting point to below OoC. Since melting and freezing points are identical, we expect water to freeze at a lower temperature. This is why salt is used in the winter on ice, if temperatures aren't too low, the salt will actually lower the melting point of the ice enough that it will melt, even at…