Chapter 3, Problem 95A

Interpretation Introduction

Interpretation:

Whether the gas escape from the opened soft drink bottle is a physical or chemical change needs to be determined.

Concept introduction:

Physical changes, changes the forms of the chemical substance and doesn’t affect the chemical composition. The proportion of the chemical elements in the respective compounds remains same.

Answer to Problem 95A

It is a physical change.

Explanation of Solution

The gas escaping from the opened soft drink bottle is a physical change as there is no breaking or forming of chemical bonds. Chemical change require the change in chemical formula or the total change of compound as they react to form a new compound by breaking and forming a new bonds.

The composition of carbon dioxide $C{O}_2$ gas inside and outside the soft drink is same.

Conclusion

The $C{O}_2$ released hasn’t changed its chemical formula, so it is a physical change.