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.
Sports injuries are among the most common causes of a broken collarbone. Other frequent causes are falls and car, motorcycle or bike accidents. 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.