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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.
Sugar produces carbon dioxide and alcohol. Other products are made by changing the fungus and starting compounds. These products include vitamins, hormones, antibiotics, enzymes, acids and alcohol. The yeast experiment page, Yeast_exp.htm, shows fermentation in action. Yeast added to soda produces carbon dioxide that blows up the balloon.