Which of the following example demonstrates the reversibility of a chemical change?(1 point)
Responses
recharging batteries
dehydrating sugar water
refreezing carbon dioxide gas into dry ice
the rotting of eggs
The example that demonstrates the reversibility of a chemical change is "recharging batteries."
During the recharging process, the chemical reactions that occur in the battery when it is discharged are reversed. Essentially, the electrical energy supplied to recharge the battery is converted back into chemical potential energy stored within the battery. This is a common example of a reversible chemical change.
The other examples listed are not reversible through simple chemical means:
- Dehydrating sugar water is a physical process of removing water; while the water can be added back to sugar, the process itself isn't a chemical change.
- Refreezing carbon dioxide gas into dry ice is a change of state from gas to solid, which is a physical change, not a chemical one.
- The rotting of eggs is an irreversible chemical change where the organic material decomposes into various simpler substances due to chemical reactions, typically not reversible.
what is the correct answer
I apologize for any confusion. The correct answer that demonstrates the reversibility of a chemical change is "recharging batteries." This is because recharging a battery involves reversing the chemical reactions that occur during its discharge, thereby restoring the reactants to their original state and re-storing the energy within the battery for future use. This is a clear example of a reversible chemical change.
To determine which example demonstrates the reversibility of a chemical change, we need to understand what reversibility means in the context of chemical changes. Reversibility refers to the ability of a chemical change to be easily reversed or undone.
Now, let's analyze the given options:
1. Recharging batteries: This does not demonstrate the reversibility of a chemical change because recharging batteries involves a conversion of chemical energy into electrical energy, which is not easily reversible without an external power source.
2. Dehydrating sugar water: This example does not demonstrate the reversibility of a chemical change. Dehydrating sugar water involves removing water from the solution to leave solid sugar behind. It is difficult to reverse this process and regain the original solution.
3. Refreezing carbon dioxide gas into dry ice: This example demonstrates the reversibility of a chemical change. Carbon dioxide gas can be converted into dry ice by lowering the temperature and increasing the pressure. Dry ice can then be converted back into carbon dioxide gas by increasing the temperature and decreasing the pressure. This process can be repeated, demonstrating the reversibility of the chemical change.
4. The rotting of eggs: This example does not demonstrate the reversibility of a chemical change. Rotting of eggs involves biological processes where organic substances break down and are decomposed, which is not easily reversible.
Therefore, the correct answer is: "refreezing carbon dioxide gas into dry ice" demonstrates the reversibility of a chemical change.