How long does it take for an ice cube to melt in room temperature salt water?
Melting ice takes heat energy from the surroundings — 80 calories per gram of water, salt or no salt. The rate at which the ice melts depends on the rate at which heat energy flows in.
When you add salt, it dissolves into the water of the ice cube. Salt water freezes at the lower temperature than the freshwater, and this is why salt is used to melt ice on sidewalks and roadways. Here we can see how other substances affect the melting of ice, where the salt melts it the fastest out of these five.
Salt, when placed on top of a melting ice cube, will dissolve in the little bit of water that melts first, and the dissolved salt lowers the melting temperature of the ice it’s in contact with.
In a room temperature water, it would melt in 5-10 minutes. I tried this myself, and it was 17 minutes. The time it takes for an ice cube to melt in cold water will depend on the ice temperature, ice volume, the temperature of the water and the water volume.
In water, salt is a solute, and it will break into its elements. So, if you’re using table salt, also known as sodium chloride (NaCl), to melt ice, the salt will dissolve into separate sodium ions and chloride ions.
When added to ice, salt first dissolves in the film of liquid water that is always present on the surface, thereby lowering its freezing point below the ices temperature. Ice in contact with salty water therefore melts, creating more liquid water, which dissolves more salt, thereby causing more ice to melt, and so on.
When you add salt it dissolves into the water of the ice cube. Salt water freezes at a lower temperature than the 32 degrees F at which freshwater freezes. This makes the ice with salt on it melt faster.
A 1 inch ice cube at 75°F room temperature (24°C) will take 45 to 60 minutes to melt. A standard 1 ounce cube (30 grams) will take 90 to 120 minutes to melt at the same temperature.
A 1 inch ice cube, submerged in a cup of cold water would take about 15-20 minutes to melt. In a room temperature water, it would melt in 5-10 minutes.