Heating rate

b (K min1)

Temperature

range (T) (K)

Pre exponential

factor (A) (s1)

Activation energy

(Ea) (kJ mol1)

5

540 - 600

2.2 × 105

88.07

655 - 778

1.27 × 103

82.25

10

550 - 610

3.50 × 109

131.50

704 - 840

8.11

53.42

20

574 - 619

2.93 × 1011

152.47

695 - 900

1.79

45.38

40

556 - 626

8.52 × 109

131.86

715 - 995

1.04

26.69