❓ why
Why do fizzy drinks go flat?
foodchemistry
Quick Answer
Carbon dioxide is dissolved under pressure; once opened, the gas escapes until the drink matches the air pressure.
The Full Story
Fizzy drinks are carbonated by dissolving carbon dioxide into them under high pressure and sealing the container. Opening it releases pressure, and, following Henry's law, the gas begins escaping as bubbles. Warm drinks lose gas faster because warmer liquid holds less dissolved CO₂. Shaking, stirring or pouring roughly also speeds up the loss.
Key Facts
1.Joseph Priestley invented a method for carbonating water in 1767.
2.Bubbles form at tiny scratches or particles called nucleation sites.
3.Cold drinks keep their fizz longer.
YouTube Angle
Suggested video title for this topic:
"Why Soda Goes Flat — The Chemistry of Fizz"