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100 degrees
This depends on many factors.
This depends on many factors.
There is no standard length of time that it takes for a gallon of water to freeze. The amount of time it takes for a gallon of water to freeze can vary depending upon many different things such as temperature.
It could take between one and four months for a cup of water to evaporate indoors at 65 degrees depending on the surface area and the humidity.
Yes. As long as there is sufficient heat water can evaporate in the dark.
Easy, heat it up to a temperature above 100 degrees Celsius with a Bunsen or something
I don't frickin know
This is not true.
Epsom salt will never evaporate. If the Epsom salts are dissolved in water, the water will evaporate, leaving the dry salts covering the inside of the container.
This will depend on how much vinegar you are looking to have evaporate. Vinegar is a mixture of acetic acid and water. Acetic acid will evaporate faster than water at a rate of .97.
I will be astonished if you show me a river at 100 degrees Celsius in which the water is not actually boiling, let alone evaporating. Perhaps you mean: why does water in rivers evaporate at temperatures below 100 degrees Celsius. To which the answer is: water has a finite vapor pressure at every temperature; if that vapor pressure exceeds the partial pressure of water vapor in the atmosphere above the water, some of the water will evaporate until the partial pressure is equal to the vapor pressure. Even ice evaporates. Make some ice and leave it in your freezer for a long time. The ice cubes will shrink.