Â­. Â­Dry ice is frozen carbon dioxide. A block of dry ice has a surface temperature of -109.3 degrees Fahrenheit (-78.5 degrees C). Dry ice also has the very nice feature of sublimation -- as it breaks down, it turns directly into carbon dioxide gas rather than a liquid.
The time for a broken collarbone to fully heal depends on the severity of the injury. In children, complete healing may take as little as three to six weeks. In adults, six to 16 weeks or more are often necessary for a collarbone to heal solidly.
In adults, it usually takes about six to eight weeks for a broken collarbone to heal, although it can take longer. In children, it usually takes about three to six weeks to heal. However, it will take at least the same period again to restore full strength to your shoulder.While the fracture heals, a lump may develop along the collarbone.n children, it usually takes about three to six weeks to heal. However, it will take at least the same period again to restore full strength to your shoulder. While the fracture heals, a lump may develop along the collarbone.