Objects melt when they have reached an appropriate temperature and pressure where they can transition from their solid phase to their liquid phase.

At a temperature of 30 degrees (F), one pound of salt (sodium chloride) will melt 46 pounds of ice.

The temperature of the air, pavement, and the type of ice-melt compound used will affect the rate at which snow and ice melts Knowing what to use It’s important that your organization assess your needs for application of ice-melt compounds.

Depending on the type of ice melt product you’re using, the effectiveness of melting ice on sidewalks, driveways, roads, and highways will change based on the overall temperature. At lower temperatures, magnesium chloride, calcium chloride, or other salts may be better choices. As you can see, only Driveway Heat and Excel 50 melt ice at a colder temperature than Safe Paw. The problem, however, is that those two products are calcium chloride (CaCl2) salt and are the most dangerous of all the products on the list. "Sodium chloride melts ice at temperatures down to its eutectic point of –6° F (-21° C). Other ice melting products such as magnesium chloride (that's what I use at home) remain effective even with bitterly cold temperatures. Take a look at the chart above, you can see that at a temperature of 30 degrees, one pound of salt will melt 46 pounds of ice. With a lowest effective temperature of +20°F (-7°C), rock salt is a relatively slow and ineffective ice melter when temperatures are coldest. At or below 32°, it will remain frozen. The answer to your question is that ice as big as a fridge will melt whenever the temperature is above 0°C. Room temperature is approximately 25 degrees Celsius. "Sodium chloride melts ice at temperatures down to its eutectic point of –6° F (-21° C). Assuming you are at sea level, the equilibrium state of ice is 0 degrees Celsius. During the melting process, the temperature remains constant at 0 °C. Salt will “work,” i.e. Sodium chloride does a good job at melting ice when temperatures are above 16 degrees Fahrenheit (minus 9 Celsius), according to the video. Lawns and other plants can be harmed if rock salt deicer is over-applied or large quantities are directly applied to grass or vegetation. For example, solid calcium chloride releases heat and is effective down to –25 degrees Fahrenheit. The important variable is not the air temperature in this case, but the pavement temperature. The important variable is not the air temperature in this case, but the pavement temperature. Ice cubes melt as the molecules of air, water or other substances around the ice transfer heat into the molecules of the ice itself. The temperature will remain at 32°F (0°C) until all the ice is melted. So, ice begins to melt when the temperature rises above 0 degrees Celsius. As someone mentioned, there are a few other factors. What are the conditions for melting, crystallization, evaporation and condensation of water? One is that the amount of ice that can be melted per pound of salt (or any other deicer) decreases with temperature. Ice melts due to the chemical properties of water. Impurities alter the temperature … Source. Ice melts at temperatures above 0 degrees Celsius. The lowest melting point of the water and ice-melt compound solution is termed the “eutectic” temperature. Three factors that affect the rate at which ice melts are temperature, pressure, and the presence of impurities. At What Temperature Does Snow Melt? Ice forms when the­ temperature of water reaches 32 degrees Fahrenheit (0 degrees Celsius), and that includes ice on roadways. Elevation will change the melting and boiling points. Snow can actually survive a descent of 1,000 to 2,000 feet before melting. For example, solid calcium chloride releases heat and is effective down to –25 degrees Fahrenheit.