Table 6: Activation parameters of theobromine in different PEG media.

Type of PEGPEG % (V/V) at 300 K Equation # # # J/Kmol
kJ/mol

PEG-2000.50.21 = −5.2713 0.99943.780.0111
1.00.23 = −5.9167 0.99949.177.093.3
2.00.30 = −4.7454 0.99639.376.2123
3.00.32 = −4.6086 0.99938.276.0126
4.00.35 = −4.4002 0.97936.575.8131
5.00.44 = −3.5467 0.98129.475.3153

PEG-3000.50.16 = −5.8962 0.97348.977.796.3
1.00.21 = −4.983 0.98041.377.0119
2.00.23 = −5.2059 0.98743.076.6112
3.00.30 = −5.236 0.97243.476.7111
4.00.35 = −4.632 0.95638.475.6124
5.00.42 = −4.6308 0.96238.475.3123

PEG-4000.50.14 = −6.9315 0.98757.578.168.8
1.00.21 = −6.0803 0.95350.477.088.8
2.00.30 = −4.5372 0.97137.676.0128
3.00.35 = −5.2988 0.97243.975.7106
4.00.35 = −6.2994 0.97852.3108186
5.00.42 = −5.7161 0.99747.476.193.7

PEG-6000.50.18 = −3.4127 0.99528.377.5164
1.00.21 = −3.0241 1.0025.077.2174
2.00.28 = −2.0791 0.99617.276.3197
3.00.32 = −2.3784 0.99819.779.4188
4.00.42 = −1.7943 0.96314.872.4192
5.00.51 = −2.9311 0.99524.375.0169