Freezing Point Depression

Overview

The freezing point depression calculation can be performed in OLI to study the effect of salts on the freezing point of water.

Composition and Performance Survey

One way to identify the freezing point is to perform a composition survey:

Select add a survey from Add a Calculation:

Select a range from specs for Temperature to go from -10 to 10 deg C:

You will see the following plot:

Custom Calculation

Choose the single point calculation:

From the Type of Calculation, choose a Custom Calculation:

This requires some custom specifications:

Click the Specs button.

This can be a complicated screen. There is an absolute rule for this screen, the number of fixed variables (top box) must equal the number of free variables (bottom box).

Now scroll down in the top box to find H2O-sol and then select it.

Then locate Temperature in the bottom box and select it as well: