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It depends on the current humidity. Water vapor certainly does evaporate from ice, as you can see in a vapor pressure chart. If the humidity is 100%, and the air temperature is the same as that of the ice, then the evaporation and condensation are in equilibrium; i.e. water evaporates as fast as it condenses, so there is no net change in humidity. However,...


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The cheapest way is probably to use the sun, as it is done in Tunisia. In Tunisia, they dig long channels on the beach along the sea. The channels must be long and narrow, and they are filled by sea water. Now the channel is covered by an inclined glass roof. The sun heats the water through the roof, and the steam is slowly evaporated and condensed on the ...


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Activated charcoal cleans water mainly by adsorbing the impurities. You can also couple normal charcoal with sand and form alternate layers of charcoal and sand and pass water through it. It's a very effective Indian style of filtering water. Nearly all suspended particles gets blocked by the above mentioned filtering style. You can also convert normal ...


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Solubility is an equilibrium phenomenon, which means that its temperature dependence is a function only of the enthalpy change of the reaction, not the entropy. See the van't Hoff equation for the mathematical relationship. If by salt you mean sodium chloride, the dissolution in that case is only very slightly endothermic, so the solubility decreases very ...


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No. Heating usual water would be extraordinarily expensive. In all water treatment plant, all over the world, bacteria are destroyed by adding chlorine gaz Cl2 or similar substances delivering Cl2 when dissolved in water. The bacteria are killed by chlorine. So the customer drinks water containing dead bacteria. It does not hurt.


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