Question

chemical and physical changes
part a
consider the images depicting change. which statement accurately describes a change taking place in one of the images?
a the water in image ii is undergoing a chemical change because there is a change in phase
b the pipes are undergoing a physical change because they are still pipes, nothing new is formed
c a chemical change is occurring in image ii because heat energy is being removed from liquid water
d the pipes in image i are going through a chemical change called rusting; the evidence is the color change

Explanation:

A phase - change of water is a physical change, not a chemical change (eliminating A). Removing heat energy from liquid water to form ice is a physical change of state, not a chemical change (eliminating C). The pipes in image I show a physical change as they are still paper - like substances without a new chemical formation (eliminating D). Physical changes do not result in new substances being formed, and the paper pipes are undergoing a physical change as stated in option B.

Answer:

B. The pipes are undergoing a physical change because they are still papers, nothing new is formed.