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Some PH(3)(g) is introduced into a flas...

Some `PH_(3)(g)` is introduced into a flask at `600^(@)C` containing an intert gas. `PH_(3)` proceeds to decompose into `P_(4)(g) and H_(2)(g)` and the reaction goes to complection. Total pressure is given below as a fucntion of time. Find the order of the reaction and calcualate the rate constant. `{:("Time (sec)",0,60,120,oo),("Pressure (mm Hg)",262.40,272.90,275.51,276.51):}`

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