A small reaction bomb fitted with a sensitive pressure measuring device is flushed out and filled with pure dimethyl ether at 140'C and 760 mm of Hg, a temperature low enough that the reaction does not proceed to any appreciable extent. The temperature is raised rapidly to 504C and reaction is carried out isothermally at 504C in a constant volume reactor. The stoichiometry of the reaction is as follows: (CH,),0- (CH,),0->CH, + H, +CO Determine the rate equation in units of moles, liters and minutes which will satisfactorily fit the data 390 1195 3155 Time, see Pressure increase (mm of Hg) 476 96 250