Table 7: Values of enthalpy of absorption ( ), entropy of absorption ( ), and Gibbs free energy ( ) of snail shell powder filled natural rubber (filler particle size, 0.075 μm).

SolventFillercontent (g) (KJ/mol) (J/mol) (KJ/mol)

228.74 × 10218.8528.68 × 102
522.42 × 10216.8122.37 × 102
Benzene1018.93 × 10215.1118.89 × 102
1532.83 × 10219.0831.74 × 102
207.81 × 10211.377.77 × 102

226.42 × 10218.4126.36 × 102
525.72 × 10217.7525.67 × 102
Toluene1023.05 × 10216.3423.00 × 102
1524.05 × 10216.8024.00 × 102
2032.83 × 10219.7232.77 × 102

28.77 × 10213.388.73 × 102
514.48 × 10214.6114.44 × 102
Xylene1018.09 × 10215.2018.05 × 102
155.57 × 10211.545.53 × 102
209.82 × 10212.339.78 × 102