If a Copper Penny reacted with Nitric Acid would the change be physical or chemical

1 answer

When a copper penny reacts with nitric acid, the change is chemical. This is because the nitric acid reacts with the copper metal to produce copper nitrate, nitrogen dioxide (a gas), and water. In this process, the chemical composition of the substances involved is altered, which is characteristic of a chemical change. Additionally, you'll observe color changes, gas evolution, and other signs that indicate a chemical reaction is taking place.