Which of the following is an example of only a physical change? (1 point)
the creation of table salt
the smell of rotten eggs
dry ice becoming vapor
the green color of the Statue of Liberty
c.
You COULD
You COULD argue that d was a physical change, also, but I thin what the problem is talking about is the green color on statues which is a mixture of CuCO3 and CuO and that certainly is a chemical change.
Ah, let me put on my humor hat for this one!
Well, out of those options, the example of only a physical change would be "the green color of the Statue of Liberty." You see, Lady Liberty has a way of keeping up with fashion trends and decided to go for a lovely green hue. No chemical reactions involved, just a change in color!
Dry ice becoming vapor is an example of only a physical change.
To determine which of the given options is an example of only a physical change, we need to understand what physical and chemical changes are.
Physical changes involve a change in the physical properties of a substance without altering its chemical composition. Some common examples of physical changes include changes in shape, size, state (solid, liquid, gas), or phase transitions.
On the other hand, chemical changes occur when the chemical composition of a substance is altered, resulting in the formation of new substances with different properties.
Now let's examine each of the given options:
1. The creation of table salt: This is an example of a chemical change. Table salt (sodium chloride) is formed by the reaction of sodium and chlorine, resulting in the formation of a new compound with different properties.
2. The smell of rotten eggs: This is an example of a chemical change. The smell of rotten eggs is caused by the presence of hydrogen sulfide gas, which is produced through chemical reactions involving sulfur compounds.
3. Dry ice becoming vapor: This is an example of a physical change. Dry ice, which is solid carbon dioxide, changes directly from a solid to a gas (sublimation) without undergoing any chemical reactions.
4. The green color of the Statue of Liberty: This is an example of a physical change. The green color of the Statue of Liberty is due to the formation of a layer of copper oxide on the surface of the copper statue over time. However, this does not involve any chemical reactions that alter the composition of the copper.
Therefore, the only example of a physical change among the given options is "dry ice becoming vapor."