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For the thermal decomposition of acetald...

For the thermal decomposition of acetaldehyde, `CH_(3)CHO(g)to CH_(4)(g)+CO(g)`, the following rate data were obtained :
`{:("Experiment",,,"Initial pressure (torr)",,,"Initial rate of increase in total pressure (torr)"),(" "1,,," "300,,," "0.61(r_(1))),(" "2,,," "200,,," "0.27(r_(2))):}`
Predict the order of reaction.

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