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.
Answer: A broken collarbone can take several months to heal completely. Until then, moving your shoulder will tend to move the area where the bone was broken, and that can be painful. Most broken collarbones heal quite well and do not require surgery.n adults, six to 16 weeks or more are often necessary for a collarbone to heal solidly. Unfortunately, during that time there is no way to completely immobilize a collarbone fracture to keep it from moving and, thus, speed healing, as can be done using a cast on other broken bones, such as a wrist, arm or leg.