Evaporation of lithium bromide solution
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The boiling point of lithium bromide is above 1000 degrees, while the boiling point of water is 100 degrees. When a heating medium with a temperature of 80 degrees is used to heat the lithium bromide solution, water evaporates from the solution. What is the principle behind this? I don’t quite understand it; those who know can explain, thank you
This is because the boiling points of water and lithium bromide in the solution do not simply add up. Water evaporates from the solution based on its vapor pressure, while lithium bromide remains in the solution. At a temperature of 80 degrees, the vapor pressure of water is high enough for it to evaporate and leave the solution, whereas the vapor pressure of lithium bromide is very low, so it does not evaporate. This is the basic principle of solution evaporation. .
80 degrees is probably just a preheating temperature; to actually recover the concentrated lithium bromide solution, steam or gas is needed