Heat causes ice to melt. Ice returns to the liquid state when the temperature rises above the freezing point of water, which is 32 degrees Fahrenheit or 0 degrees Celsius. Additionally, because of the specific and unusual characteristics of water, increased pressure causes it to melt as well.Continue Reading
As with most substances, water can exist in at least three states of mater. If water is warmer than 212 degrees Fahrenheit, it takes the form of a gas, and is called water vapor. If it cools to below this temperature, it condenses into the liquid state. If the water continues to cool, it eventually turns into a solid called ice.
Some substances can lower the freezing temperature of water, which will make ice revert to its liquid form. Salt is one such chemical, which is why municipalities cover frozen roads with it. As long as the temperatures are above 15 degrees Fahrenheit, the salt melts most of the snow or ice.
Unlike most substances that take up less space when they freeze, ice takes up more space than an equal amount of water does. When pressure is applied to ice, it resists collapsing and melts instead. In some very specific conditions, water can be cooled below the freezing point.Learn more about States of Matter
According to What's Cooking America, chocolate melts because its cocoa butter crystals liquefy when heated. The melting point of a given chocolate type is inversely proportionate to its cocoa butter content. White chocolate melts at a low temperature because it contains more cocoa butter than other types of chocolate. Dark chocolate, which contains the smallest percentage of cocoa butter, has a higher melting point.Full Answer >
Different types of plastics have drastically different melting points, which means some plastics such as polyvinyl chloride plastics can melt at as low as 165 degrees Fahrenheit, while other types such as the plastic in Teflon cookware will not melt until they reach temperatures of around 600 degrees or hotter. Most sturdy plastics will melt before 500 degrees.Full Answer >
Although it technically depends on the exact molecular makeup of the glass in question, glass typically melts between 2,500 degrees Fahrenheit and 2,900 degrees F (approximately 1,400 - 1,600 degrees Celsius). Certain types of glass can melt at lower temperatures, but commercial glass must reach that approximate temperature before melting.Full Answer >
The melting point of pure 24-carat gold is 1945 degrees Fahrenheit. This is fairly average for a metal, being three times higher than the melting point of lead and a third of the melting point of tungsten.Full Answer >