Why does gas in soda water kept in an open glass slowly decrease?
Answer and explanation
Correct answer: Because pressure is low and gas escapes
In an open glass, the pressure of carbon dioxide above the liquid is much lower than it was in the sealed bottle. Henry's law therefore predicts a lower equilibrium solubility. The excess dissolved gas gradually diffuses out and is seen as bubbles, while the liquid approaches equilibrium with the surrounding air. The gas does not transform into sugar, and glass material is not the cause.
Frequently asked questions
What is the correct answer to this question?
Because pressure is low and gas escapes
Why is this the correct answer?
In an open glass, the pressure of carbon dioxide above the liquid is much lower than it was in the sealed bottle. Henry's law therefore predicts a lower equilibrium solubility. The excess dissolved gas gradually diffuses out and is seen as bubbles, while the liquid approaches equilibrium with the surrounding air. The gas does not transform into sugar, and glass material is not the cause.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
