Which of the following represents a chemical change?
a) Ice melting
b) Steam condensing
c) Wood burning
d) Sugar dissolving
e) Water evaporating
c) Wood burning
are you correct?
Yes, I am correct. Wood burning represents a chemical change because it involves the combustion of cellulose and other organic compounds in the wood, resulting in the release of heat, light, and gases like carbon dioxide and water vapor.
The correct answer is c) Wood burning.
A chemical change, also known as a chemical reaction, involves the rearrangement of atoms and the formation of new substances. In the case of wood burning, the chemical reaction involves the combustion of wood, which releases energy and produces carbon dioxide, water vapor, and ash. This process results in the formation of new substances and the release of energy in the form of heat and light.
To determine which of the given options represent a chemical change, we need to understand the nature of each process.
a) Ice melting: This is a physical change, not a chemical change. It involves a phase change from solid to liquid, where the substance (water) retains its chemical composition.
b) Steam condensing: This is also a physical change. It involves a phase change from gas (steam) to liquid (water). The chemical composition of the substance remains the same.
d) Sugar dissolving: This is a physical change, not a chemical change. It involves the sugar molecules dispersing and mixing with the solvent (water) to form a homogeneous solution. The chemical composition of both the sugar and water remains unchanged.
e) Water evaporating: This is a physical change. It involves a phase change from liquid to gas, where the water molecules gain enough energy to escape the liquid and enter the gaseous state. The chemical composition of the water remains the same.
In summary, the only process that represents a chemical change among the given options is c) Wood burning.