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2 NO + 2 H 2 → N 2 + 2 H 2 O The above reaction has been studied at 800 ° C . The related data are given in the table below Reaction serial number Initial pressure of H 2 / kPa Initial Pressure of NO / kPa Initial rate - dp dt / kPa / s 1 65 . 6 40 . 0 0 . 135 2 65 . 6 20 . 1 0 . 033 3 38 . 6 65 . 6 0 . 214 4 19 . 2 65 . 6 0 . 106 The order of the reaction with respect to NO is____

Correct answer

0

Step-by-step solution

The rate law for the reaction 2 NO + 2 H 2 → N 2 + 2 H 2 O is r = k H 2 m NO n The powers of the concentration terms m, n are the order with respect to hydrogen and nitric oxide respectively. r 1 = 65 . 6 m 40 . 0 n = 0 . 135 r 2 = 65 . 6 m 20 . 1 n = 0 . 033 r 3 = 38 . 6 m 65 . 6 n = 0 . 214 r 4 = 19 . 2 m 65 . 6 n = 0 . 106 r 1 r 2 = 65 . 6 m 40 . 0 n 65 . 6 m 20 . 1 n = 0 . 135 0 . 033 = 4 ⇒ 2 n = 4 ⇒ n = 2 Hence, the order with respect to NO is 2 .

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