Thank you so much for answering. I didn't know the posting procedure as its my first time on here. Will remember next time..thanksCWatters said:Homework (or similar) should be in the homework section of the forum so this thread might get moved.
What chemical reactions are you familiar with that involve copper? What can pure copper react with and what does it turn into? Do those reaction products conduct electricity? If not then the resulting wire will comprise less pure copper and more insulator than the original wire. That will change the overall resistivity.
Philip Wood said:For a specimen of solid copper, the inside won't be exposed to the corroding agent(s). It is the (original) surface that will be corroded, though the corrosion will spread further and further into the metal. The corrosion would have to be very severe for none of the original metal to remain. For example, for a copper wire, it's the outer layers that would be corroded at first. There will be a huge increase in resistivity of the affected layers. Would you expect the uncorroded metal (if any remains) to suffer much change in resistivity?
Corrosion is the process of gradual deterioration of a metal due to chemical reactions with its surroundings. In the case of copper wire, corrosion can increase the resistivity of the wire by creating barriers for the flow of electricity. This is because corrosion can form a layer of non-conductive material on the surface of the wire, hindering the movement of electrons.
Yes, if left untreated, corrosion can completely destroy the conductivity of copper wire. However, this process can take a long time and may depend on the environment in which the wire is placed. If the wire is constantly exposed to corrosive elements, it is more likely to lose its conductivity faster.
To prevent corrosion from affecting the resistivity of copper wire, it is important to protect the wire from exposure to corrosive elements such as moisture, oxygen, and certain chemicals. This can be done by using a protective coating on the wire or by storing it in a dry and controlled environment.
Yes, apart from corrosion, other factors such as temperature, impurities, and mechanical stress can also affect the resistivity of copper wire. High temperatures can increase the resistivity of copper wire, while impurities and mechanical stress can decrease it.
In some cases, it is possible to reverse the effects of corrosion on the resistivity of copper wire by cleaning and removing the corroded layer from the surface. However, this may not always be effective and it is best to prevent corrosion from occurring in the first place.