Adsorption:Problems:Problem 3

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BET analysis

In this problem, you will determine how well the BET model describes our simple adsorbate system.

1. Obtain isotherms up to at both T=0.90 and T=1.0 for and , as in Example 1. How do they differ?

2. Make "BET plots" of vs (see BET model for details) for each of your data sets. Obtain values for and in each case, by fitting a line to data between 0.05 < 0.30. (Make sure to have several measured points in this region of the isotherms!

3. How similar are the values of the monolayer capacity obtained?

4. The quantity should be proportional to . How well do your data fit this relation?