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.
The time it takes for a bone to completely heal and to be back to its normal condition depends on the type of bone that is broken and where it is located. Generally, bones with a reduced blood supply will take longer to heal.Other factors that affect the duration of the healing process include activities like drinking alcohol and smoking. Here is a list of the bones in some parts of the body and their estimate time of healing: 1  Collar bone takes 3-8 weeks of healing time. Collar bone takes 3-8 weeks of healing time. 2  Shoulder blade takes 6 weeks of healing time. 3  Ribs takes 4 weeks of healing time. 4  Upper arm takes 4-10 weeks of healing time.