What is meant by #"evaporation to dryness"#?

Answer 1

I think you mean #"evaporation to dryness.........."#

"Evaporation to dryness" is the process by which all of the water (or other liquid) evaporates from a still pot (or kettle) when it is left at reflux, or at boiling point.

Of course, even with non-flammable solvents, such a phenomenon is dangerous. When we distil water, the temperature of the kettle can get no higher than #100# #""^@C#, i.e. the normal boiling point water. Once the kettle is dry, it can get a whole lot hotter than #100# #""^@C#.

Obviously, it is best to prevent evaporation to dryness.

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Answer 2

Noah Aldrich

"Evaporation to dryness" refers to the process of evaporating a liquid completely until only the solid residue remains. This is typically done by heating the liquid in an open container, allowing the liquid to vaporize and leaving behind the dry solid material.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.