MacRoscopic Properties: The World We See

Phases of Matter and Intensive Properties

How are soft drinks carbonated?

Soft drinks are carbonated using pressurized CO2 gas and a siphon that introduces the pressurized gas into the water or soda. The CO2 gas is forced into the liquid at a concentration beyond that which could exist under atmospheric conditions and then the container is sealed, preventing it from being released. That’s why if you leave a glass of soda sitting out, it will go flat; the CO2 escapes into the air.


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