Final answer:
The given reaction represents a chemical change, where sodium bicarbonate decomposes to form sodium carbonate, carbon dioxide, and water, indicating the formation of new substances.
Step-by-step explanation:
The question relates to whether the given reaction represents a physical or chemical change. The provided reaction is actually not correct in terms of reactants and products balance, but it aims to depict a chemical change. When sodium bicarbonate (NaHCO3) is heated or reacts with acids like HCl, a decomposition reaction occurs, producing sodium carbonate (Na2CO3), carbon dioxide (CO2), and water (H2O). This is a classic example of a chemical change, where new substances with different properties from the starting materials are formed. Similarly, the reaction of CO2 with NaOH in an aqueous solution resulting in Na2CO3 and H2O is another demonstration of a chemical change.