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Beer bubbles because of the presence of carbon dioxide gas in it. During beer brewing, yeast ferments sugars to produce alcohol and carbon dioxide. When the beer bottle is closed, the carbon dioxide cannot escape, and it will dissolve in the beer and form a certain pressure.
When you open the cap of the beer bottle, the moment of decompression, the carbon dioxide gas in the beer will be released quickly, forming bubbles and bubbling out. This is because during the process of decompression, the dissolved carbon dioxide in the beer becomes unstable and changes from liquid to gas, forming a bubbling phenomenon.
So, when you open a beer bottle, the bubbles and bubbles that come out are due to the release and formation of carbon dioxide gas
According to the data show: in the beer, contains a lot of carbon dioxide, under sealed conditions, the greater the pressure, the more dissolved carbon dioxide, when opened the bottle, carbon dioxide due to the pressure reduction in the bottle, carbon dioxide in the dissolved state into a gas release, forming a large number of bubbles, followed by the release of pressure rushed out.
Especially after shaking, more carbon dioxide molecules collide together, so more bubbles are formed, because shaking reduces the solubility of the gas, causing the gas to bubble out, so more bubbles will be rushed out.
Because beer is a sparkling wine, bottled or bottled beer contains a lot of carbon dioxide, which can be produced during the fermentation process, or it can be added during the filling process. Under sealed conditions, the higher the pressure, the more carbon dioxide dissolved. When the bottle is opened, because the pressure is reduced, a large amount of carbon dioxide will be separated from the beer, forming a lot of bubbles.
After pouring out the beer, the temperature becomes higher, the gas solubility becomes smaller, the gas runs out, forming the pressure in the atmosphere, which is smaller than the pressure in the bottle, so there will be bubbling phenomenon.
Because beer is pressed into a lot of carbon dioxide gas, carbon dioxide gas can form carbonic acid with water at high pressure.
Beer is malt, water as the main raw materials, with hops (including hop products), yeast fermentation brewed, containing carbon dioxide, sparkling, low alcohol fermentation.