Model I:  H+ - SO42− - NO3 - Cl - Br - H2O

Parametrics:  variable relative humidity, or total water

Here relative humidity, or the total water content of the system, are varied over a user-specified range. A maximum of 100 points can be generated. Further information on the input and output quantities is given here.

First, choose the form of output required:

Normal       Column       Graph

Next, specify the problem in the input fields below.

Ambient Conditions

(1)  Temperature (180 - 330 K):

(2)  The water content of the system must be specified as either ambient relative humidities or the numbers of moles of water present per m3 of atmosphere. Select one:

   Relative humidity          Total water

Enter the initial and final relative humidities (range 0.1 - 1.0) or moles of water present, followed by the number of points to be calculated:

Start value:      End value:      No. of points:

(3) If the total water in the system is being varied, and you wish it all to remain in the condensed phase, then check the box here. (If relative humidity is being varied then this option has no effect.)

Ionic Composition in Moles per m3

H+:     SO42:
NO3:     Cl:     Br:

Other Chemical Components

The amounts of organic compounds present can be entered here. First, click the button to select compounds from the library or create new ones for this session.

Trace Gases

Check the boxes below to disable the partitioning of selected trace gases into the vapour phase. (The default for each gas is that partitioning is calculated.)

Prevent partitioning of the following gases:


Solid Phases

Check the boxes below to prevent the formation of selected solids, as many as desired. This enables the properties of metastable, supersaturated, aqueous aerosols to be investigated. (The default for each calculation is that all solids can form.)

Omit the following solids:

Ice H2SO4 · H2O H2SO4 · 2H2O
H2SO4 · 3H2O H2SO4 · 4H2O H2SO4 · 6.5H2O
HNO3 · H2O HNO3 · 2H2O HNO3 · 3H2O
HCl · 3H2O

To submit your calculation, click here: