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Thermal cracking. In thermal cracking, high temperatures (typically in the range of 450Â°C to 750Â°C) and pressures (up to about 70 atmospheres) are used to break the large hydrocarbons into smaller ones. Thermal cracking gives mixtures of products containing high proportions of hydrocarbons with double bonds - alkenes.
Best Answer: There are different reasons: Escaping gases: Scientists explain that synovial fluid present in your joints acts as a lubricant. The fluid contains the gases oxygen, nitrogen, and carbon dioxide. When you pop or crack a joint, you stretch the joint capsule.eport Abuse. Cracking your knuckles feels so good because when you do it your body releases endorphins or opiates into your brain. Its the bodies natural drug. This feeling can also be reproduced by going to the gym, eating chocolate, an orgasm, ect.