The option that is an example of only a physical change is:
"the green color of the Statue of Liberty"
This green color is due to the patina formed on the copper surface as a result of oxidation over time. It is essentially copper carbonate, which forms when copper oxidizes and results from exposure to moist air over a prolonged period. The underlying copper has not changed into a different substance, but rather its surface has undergone a physical reaction with the environment, changing the appearance but not the chemical composition of the copper.
Which of the following is an example of only a physical change?(1 point)
Responses
the smell of rotten eggs
the green color of the Statue of Liberty
the creation of table salt
dry ice becoming vapor
3 answers
what is the correct answer
Apologies for the confusion. The correct example of a physical change from the options provided is:
"dry ice becoming vapor"
This process is known as sublimation, where dry ice (solid carbon dioxide) changes directly from a solid to a gas without going through a liquid phase. This is strictly a physical change because the substance remains carbon dioxide before and after the change; its state of matter is what changes.
"dry ice becoming vapor"
This process is known as sublimation, where dry ice (solid carbon dioxide) changes directly from a solid to a gas without going through a liquid phase. This is strictly a physical change because the substance remains carbon dioxide before and after the change; its state of matter is what changes.