At 518 o C , the rate of decomposition of a sample of gaseous acetaldehyde, initially at a pressure of 363 Torr was 1 .00 Torr s - 1 when 5 % had reacted and 0 .50 Torr s - 1 when 33% had reacted. The

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At 518 o C , the rate of decomposition of a sample of gaseous acetaldehyde, initially at a pressure of 363 Torr was 1 .00 Torr s - 1 when 5 % had reacted and 0 .50 Torr s - 1 when 33% had reacted. The order of the reaction is:

TestHub · Accepted Answer

Rate ∝ concentration n Let the initial concentration be 1 M . According to the question, Concentration Rate 0 . 95 M 1 0 . 67 M 0 . 5 Substituting in the general rate expression, 0 .95 0 .67 n = 1 0 .5 ⇒ n = 2

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