Table 5 ΔH and ΔS values of sections 2A and 2B of adsorption of MB on agar in different weight percentages of ethanol and 2-propanol aqueous binary mixtures at 308-328 K
From: Adsorptive removal of methylene blue by agar: effects of NaCl and ethanol
System | ΔH(kJ mol-1) | ΔS(J mol-1 K-1) | System | ΔH(kJ mol-1) | ΔS(J mol-1 K-1) |
|---|---|---|---|---|---|
Section 2A | Section 2B | ||||
Water | -32.8 | 5.2 | Water | -36.1 | -10.7 |
EtOH (2.5%) | -33.4 | 0.5 | EtOH (2.5%) | 26.0 | 183.3 |
EtOH (5.0%) | -20.0 | 41.3 | EtOH (5.0%) | -19.9 | 34.9 |
EtOH (7.5%) | -28.2 | 10.4 | EtOH (7.5%) | -47.6 | -53.8 |
EtOH (10.0%) | -33.8 | -10.2 | EtOH (10.0%) | -70.3 | -128.7 |