Are batteries heavier when fully charged?
2006-11-10 21:52:11 · 8 answers · asked by rayandroid 1 in Science & Mathematics ➔ Engineering
Answer to your question is 'No' if we neglect slight weight loss due to evaporation of water due to the heat generated while the charging is going on.
The lead-acid battery is recharged, meaning the chemical reactions are made from discharged to charged, from flat by way of transferring molecule between the positive and negative plates in reverse order then when it got discharged while in use. Therefore, the total weight remains the same at charge and discharge condition, assuming the weight of added electrolyte is negligible.
However, one of the problems with the plates in a lead-acid battery is that the plates change size as the battery charges and discharges, the plates increasing in size as the active material absorbs sulphate from the acid during discharge, and decreasing as they give up the sulphate during charging. This causes the plates to gradually shed the paste during their life. It is important that there is plenty of room underneath the plates to catch this shed material. If this material reaches the plates a shorted cell will occur
PS. Lead-acid car batteries for a 12 volt system consist of six cells of 2.1 V nominal voltage. Each cell contains (in the charged state) electrodes of lead metal (Pb) and lead oxide (PbO2) in an electrolyte of about 37% (or 6-12M) w/w sulfuric acid (H2SO4). In the discharged state both electrodes turn into lead sulfate (PbSO4) and the electrolyte loses its dissolved sulfuric acid and becomes primarily water.
2006-11-10 22:25:44 · answer #1 · answered by Hafiz 7 · 1⤊ 0⤋
First you may desire to be conscious of if your battery is broken or expired. If this is not sealed, open it and use a flashlight to verify interior with the front lighting fixtures furniture on. in case you spot any bubbles, your battery is shot. perhaps you have a short on your motor vehicle, no longer so enormous as to blow a fuse. Disconnect between the battery terminals and in between the battery and the cable, connect a small lightbulb. It shouldn't easy on (no longer even slightly) while each little thing's off on your vehicle. If it happens, you have have been given a short which must be got here across and glued. yet another selection is that your alternator / regulator are defective. you may desire to verify those with an ammeter together as the motor vehicle is working yet you may desire to be conscious of how enormous the charge ought to be. Or verify the battery voltage with the engine working. It should not be under 13.5 V. stable success!
2016-12-28 18:39:40 · answer #2 · answered by Anonymous · 0⤊ 0⤋
1
2017-03-05 06:10:35 · answer #3 · answered by Jennifer 3 · 0⤊ 0⤋
No. But sometimes, people replenish water or an electrolytic solution in batteries that were low, which of course will make them weigh more. But just charging, nope.
2006-11-10 21:56:19 · answer #4 · answered by martino 5 · 0⤊ 0⤋
I don't think so because you are just moving molecules around in the battery.
2006-11-10 21:55:32 · answer #5 · answered by tumbleweed1954 6 · 0⤊ 0⤋
I would say batteries are lighter when depleted
2006-11-10 22:00:12 · answer #6 · answered by Anonymous · 0⤊ 0⤋
unless you added more water, you should not notice the difference, unless you can measure atomic weight of electrons
2006-11-10 22:07:06 · answer #7 · answered by dragongml 3 · 0⤊ 0⤋
it shud.. becoz the con. becoz u add more acid.. think so:(
2006-11-10 21:57:31 · answer #8 · answered by tut_einstein 2 · 0⤊ 0⤋