For N2 adsorbed on a certain sample of charcoal at −77°C, adsorbed volumes (recalculated to 0°C and 1 atm) per gram of charcoal vs. N2 pressure are
P/atm | 3.5 | 10.0 | 16.7 | 25.7 | 33.5 | 39.2 |
υ/(cm3/g) | 101 | 136 | 153 | 162 | 165 | 166 |
(a) Fit the data with the Langmuir isotherm (16.128) and give the values of υmon and b. (b) Fit the data with the Freundlich isotherm and give the values of k and a. (c) Calculate υ at 7.0 atm using both the Langmuir isotherm and the Freundlich isotherm.
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