Which of the following changes is NOT correctly labeled as a chemical reaction or a change of state?
A) rust forming on metal, a chemical reaction
B) steam coming off of a cup of coffee, a change of state
C) an ice cube melting in a drink, a change of state
D) the combustion of gasoline to give carbon dioxide and water, a chemical reaction
E) bubbles forming in a just-opened can of soda, a chemical reaction

Question

Quizplus · Accepted Answer

Bubbles forming in a just-opened can of soda are due to the release of carbon dioxide gas that was dissolved under pressure, not a chemical reaction. This is a physical change related to the change in pressure, allowing the gas to escape from the liquid.

Which of the Following Changes Is NOT Correctly Labeled as a Chemical