Question
Sat July 07, 2012 By:
 

how does the presence of volatile impuritiy influence the boiling point of a liquid?

Expert Reply
Sat July 07, 2012
The reason why the boiling point of the substance is raised is because the two components in the solution - in this case, the water and the salt - form chemical bonds with each other. These bonds require a lot of energy in order to break them. In this case, the bonds are being broken by heat energy, when the solution is heated to temperatures of over 100? Celsius. However, it requires more heat energy to break the bonds in order to boil the water, than it takes to simply boil pure water on its own. As more heat energy is required, the boiling point of the solution increases.
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