Concept explainers
Interpretation:
Physical properties of eggs before and after they are cooked need to be listed. Whether cooking eggs is a physical or chemical property needs to be determined.
Concept introduction:
Physical changes involves the change in substances without undergoing a change in chemical composition. Chemical changes involves the change in the composition of the substance as the substances break and combine to form a new

Answer to Problem 87A
Cooking or boiling of an egg brings the permanent changes in the molecular structure of the egg.
Explanation of Solution
Boiling or cooking an egg changes the composition of an egg permanently. The chemical composition changes as the proteins unfolds that further links to another proteins. The new strong bonds formed in between proteins and between proteins and water molecule that surrounds protein turns the egg hard.
Cooking or boiling of an egg brings the permanent changes in the molecular structure of the egg.
Chapter 3 Solutions
Chemistry: Matter and Change
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