Why is more fizz seen when a cold drink bottle is opened?
Answer and explanation
Correct answer: Dissolved gas escapes because pressure decreases
Before opening, carbon dioxide is held in the drink under the elevated pressure inside the sealed bottle. Removing the cap sharply lowers the gas pressure above the liquid. Henry's law then predicts a lower equilibrium solubility, so excess dissolved carbon dioxide leaves the liquid and forms many bubbles. The fizz is not caused by sugar changing into gas or by the water reaching zero temperature.
Frequently asked questions
What is the correct answer to this question?
Dissolved gas escapes because pressure decreases
Why is this the correct answer?
Before opening, carbon dioxide is held in the drink under the elevated pressure inside the sealed bottle. Removing the cap sharply lowers the gas pressure above the liquid. Henry's law then predicts a lower equilibrium solubility, so excess dissolved carbon dioxide leaves the liquid and forms many bubbles. The fizz is not caused by sugar changing into gas or by the water reaching zero temperature.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
