Kevin's science class performed an experiment using baking soda, vinegar, a red balloon, and a flask. First, they filled the flask with vinegar and added baking soda into the deflated balloon. Then, they placed the balloon over the mouth of the flask carefully, without letting the baking soda fall into the vinegar. They observed that the balloon was still deflated.
Next, the students held the balloon up and allowed the baking soda to fall into the flask and mix with the vinegar. The mixture began to bubble, and the balloon began to inflate.
Which of the following best describes what happened when the vinegar and baking soda were mixed?
A.
A chemical reaction occurred, but no new substances were formed.
B.
A chemical reaction occurred, and a new substance was formed.
C.
A physical change occurred, and the vinegar turned into a gas.
D.
A physical change occurred, and the baking soda turned into a gas.