Kinetic Studies on Saponification of Poly(ethylene terephthalate) Waste Powder Using Conductivity Measurements

Table 5

Statistical data of thermodynamic parameters.

Number of experiments	Activation energy, (KJg^−1)	Activation enthalpy, (KJg^−1)	Activation entropy, (Jg^−1k^−1)	Activation energy,; (323 K); (KJg^−1)
1	55.0	91.4	−126.7	50.5
2	53.4	90.2	−123.9	48.5
3	54.3	90.2	−128.8	50.1
4	53.9	90.3	−126.9	49.4
5	54.6	91.4	−126.3	50.5
6	54.0	90.6	−127.5	50.1

Activation energy : 54.2 ± 0.7 kJg⁻¹.
Activation enthalpy : 90.8 ± 0.6 kJg⁻¹.
Activation entropy : −126.5 ± 1.5 Jg⁻¹K⁻¹.
Free energy of activation: 49.9 ± 0.8 KJg⁻¹.
(323 K).