✔ 最佳答案
A solution is formed when salt is dissolved in water. The boiling point of the solution formed will be higher than that pure water. This is known as "boiling point elevation".
The more the salt added, the higher the boiling point of the solution is.
Mathematically, ΔTb = 0.512mb
where ΔTb = elevation in boiling point (°C) = (boiling point of solution) - (boiling point of pure water)
and mb = molality of ions in the solution = (no. of moles of ions) / (1 kg of water)
當鹽加入水中,形成溶液。溶液的沸點較純水的沸點高。這稱為「沸點上升」。
所加入的鹽愈多,溶液的沸點愈高。
數學上,ΔTb = 0.512mb
其中 ΔTb = 沸點上升 (°C) = (溶液的沸點) - (純水的沸點)
而 mb = 溶液中離子的重量摩爾濃度 = (離子的摩爾數) / (1 kg 的水)
reference (參考資料):
http://en.wikipedia.org/wiki/Molality#Molality