In which scenario is a chemical change occurring?
A. A cup of ice cream is melting.
B. A block of dry ice is sublimating.
C. A section of iron fence is corroding.
D. A flask of chlorine gas is condensing.
A no.
B no.
C yes.
D no.
In which scenario is a physical change occurring
To determine which scenario involves a chemical change, we need to understand the difference between a physical change and a chemical change.
A physical change involves a change in the physical properties of a substance, such as its shape, size, or state of matter, without changing its chemical composition. On the other hand, a chemical change involves a rearrangement of atoms and a change in the chemical composition of the substances involved.
Let's analyze the options provided:
A. A cup of ice cream is melting.
Melting is a physical change because the ice cream is changing from a solid state to a liquid state, but the chemical composition of the ice cream remains the same.
B. A block of dry ice is sublimating.
Sublimation is the process of a solid substance directly changing to a gas without passing through the liquid state. In this case, the dry ice is changing from a solid to a gas, which is also a physical change.
C. A section of iron fence is corroding.
Corroding involves a chemical change. When iron undergoes corrosion, it reacts with oxygen in the presence of moisture to form iron oxide, commonly known as rust. This means that the composition of the iron is changing, indicating a chemical change.
D. A flask of chlorine gas is condensing.
Condensation is a physical change that occurs when a gas changes to a liquid due to a decrease in temperature or an increase in pressure. The chemical composition of the chlorine gas remains the same during this process.
From the given options, the scenario in which a chemical change is occurring is C. A section of iron fence is corroding.