The thermal decomposition of acetaldehyde, CH3CHO → CH4 + CO, is a second-order reaction. The following data were obtained at 518°C. time, s Pressure CH3CHO, mmHg 364 42 105 720 330 290 132 Calculate the rate constant, at this temperature, for the decomposition of acetaldehyde from the above data. O O 6.7 x 10-6/mmHgs O 6.7 x 106 mmHg-s O 22 x 103 mmHg s 2.2 x 103/mmHg s

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