1. The interaction of phosphorus oxide chloride with oxygen occurs according to the equation POCl3 + 3/4O2 = 1/4P4O10 + 3/2Cl2.
To determine the order of the reaction, two series of experiments were carried out at 800 C. In the first series, the reaction was carried out in excess oxygen, and in the second - at a stoichiometric ratio between the starting materials.
Series 1
Degree of conversion, % 52.5 60 69 77.5 81 86
C0(POCl3)*103, mol/l. 7.45 7.9 7.95 7.61 7.97 6.67
t, s 13.6 18.8 23.2 31.6 38.1 49
Series 2
Degree of conversion, % 38 47 55 65 67 71 75 80
t, s 736 9.1 13.6 18 22.6 30.1 36.2 46

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