Answer:
The balloon quickly becomes inflated because it is filled with CO2 gas
Step-by-step explanation:
Once the vinegar and baking soda are mixed, a chemical reaction occurs as follows;
NaHCO3+CH3COOH→CH3COONa+H2O+CO2.
Once this reaction occurs, the balloon becomes inflated because it is now filled with CO2 gas.
If the filled balloon is punctured at any point, CO2 gas escapes from it.