Ok i have this science project in two weeks.it has to deal with renewable sources and it's supposed to be a better version of what is already inventedI decided to build a solar powered water heater.possibly a small portable one that could be used on camping trips or something? 1) how long do you think this will take me to build?2) how big will the solar panel have to be?3) where can i get a solar panel?4) do you have any good websites on how to build a small heater? (all the ones i find are huge ones for powering a heater of a house)
Yes it will, especially for the aluminumSince sodium hydroxide is strongly alkaline in an aqueous solution, it can corrode metals just like acids canYou will have to use synthetic pipes instead of metal ones that are resistant to caustic solutions.
Figure out the Eknots using a chartCu - Cu2+ Enot of ? Al3+ - Al Enot of ? It needs to be positive to spontaneously reactI believe from memory that Al - Al3+ is 1.3volts, so the reverse is negativeMeanwhile Cu is something under .5 volts, so it won't be enough to make the reaction workThis is further understood because aluminum requires a lot of energy to smelt from the oxide (which is the reverse reaction of Al3+ - Al that you're talking about here) Secondly, do your homework man, it's REALLY obnoxious to add the why or why not and phrase everything exactly as your homework asksTry to ask a question about the topic so you actually learnFor example, what are reduction potentials in terms of, for example, Cu - Cu2+
You won't be buying the panel because anything manufactured is going to be too bigIf it going to be for camping then it can't involve a pump or batteries as being too heavyThe best answer would be coils of copper tubing soldered to a copper plate and painted black and two containers (plastic bags?) connected by flexible hose so you could raise one and cause water to flow through the panel to the otherThat would be moderately heavySo for your project you might look for aluminum tubing and sheet and see how to attach the tubing to the sheet (soldering works badly on aluminum) that will conduct heat from the sheet to the tubing (some glues insulate, almost all are poor conductors) Or you might see what happens if you just take two black plastic sheets and either heat seal lines so water poured in the stop has to wander back and forth to get out, taking heat from the sun as it goes or plastic tubing inside the sheets doing the sameLess efficient that metal but easier to carry and less weight.
