A clear liquid at room temperature is added to some white powder at room temperature. The mixture fizzes and bubbles. The temperature of the mixture remains at room temperature. Did a new substance form? Explain completely your evidence for your answer, using some of the scientific terms you have learned in this unit.
Yes, a new substance did form in this scenario. The fizzing and bubbling of the mixture indicates a chemical reaction taking place between the clear liquid and the white powder. This reaction results in the formation of a new substance with different chemical properties than the original substances.
The fact that the temperature of the mixture remains at room temperature suggests that this was a physical change rather than a chemical change. In a chemical change, energy is either absorbed or released, causing a change in temperature. However, because the temperature remains constant in this case, it can be inferred that the reaction did not involve any significant energy exchange and was likely a physical change.
Additionally, the formation of bubbles indicates the release of gas as a product of the reaction, further supporting the idea that a new substance was formed. Gas formation is a common indicator of a chemical reaction, as it signifies the creation of new substances with different physical properties.
Overall, the evidence from the fizzing, bubbling, and lack of temperature change points to a chemical reaction occurring between the clear liquid and the white powder, resulting in the formation of a new substance.