E-AIM Tutorial

Lesson 8: Variation of Deliquescence with Temperature


In Lesson 7 we considered the water uptake behavior of salt and acid particles as a function of temperature. Here we examine how particle deliquescence, the phase change from solid to aqueous state, depends on temperature.


Before starting, ensure that this browser window occupies only the left half of your screen. You should leave enough space for another browser window where you can enter data into E-AIM and read the results. If your screen is too small for two windows, print out this tutorial and use this window to run the E-AIM model. In these lessons we assume that you have two browser windows open.

Select this link to open a second browser window containing the data input page for "variable relative humidity, or total water" calculations using Model II (http://www.aim.env.uea.ac.uk/aim/model2/mod2rhw.php).s Arrange the windows on your screen so that both are visible and the left window contains this text.

The Lesson

This consists of two sets of calculations to determine the deliquescence points of electrolytes at different temperatures and then compare the results.

   a.  Solid/liquid equilibrium of ammonium nitrate
   b.  Solid/liquid equilibrium of ammonium sulphate


You have completed Lesson 8, and learned that:

Now proceed to Lesson 9, which examines how both solid/liquid and gas/particle phase transitions in the same system change with temperature.