Question

Classify each process as a chemical or physical change. a.) baking a cake b.) heating wax so that it melts c.)mixing a teaspoon of instant coffee with hot water d.) *image* shows O compound and HC compound undergoing change to OH and CO

Answer 1

Baking a cake is a chemical change, heating wax is a physical change, mixing instant coffee with hot water is a physical change, and the image represents a chemical change.

Step-by-step explanation:

a) Baking a cake is a chemical change because the ingredients undergo a chemical reaction, resulting in the formation of new substances. For example, when baking a cake, the ingredients react with each other in the presence of heat, causing them to change chemically into a cake.

b) Heating wax so that it melts is a physical change because it does not involve a chemical reaction. The wax undergoes a change in physical state from solid to liquid, but its chemical composition remains the same.

c) Mixing a teaspoon of instant coffee with hot water is a physical change because no new substances are formed. The coffee dissolves in the water, but its chemical composition remains unchanged.

d) The image description suggests a chemical change because there is a transformation of the O (oxygen) and HC (hydrocarbon) compounds into OH (hydroxide) and CO (carbon dioxide) compounds, indicating a chemical reaction has occurred.

Learn more about Chemical and Physical Changes