
Interpretation: The reason for change of state to be considered a physical change and not a chemical change needs to be explained.
Concept introduction: A physical change is the one that does not involve the transformation of the original material into a different material whereas a chemical change does. In a physical change the original, material remains the same. Only its form gets changed. In a physical change no

Answer to Problem 5RQ
Change of state neither involves the transformation of the original material into a different material nor involves breaking and forming of a chemical bond.
Explanation of Solution
Change of state here means changing the physical state of a substance. For example- from
Change of state follows the criteria of being a physical change. Thus it is a physical change.
Chapter 14 Solutions
World of Chemistry
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