## Question

The following data was obtaind for the vapour phase decomposition of ethylene oxide into methane and carbon monoxide at 414.5'c. t,min p,mm hg 0 116.6 5 122.56 7 125.72 9 128.74 12 133.23 18 141.37 show that the reaction is first order and calculate the rate constant.
Joshi sir comment

C2H4O -------------->           CO           +           CH4

t                                          P (C2H4O)

0                                          116.6

5                                          116.6-[122.56-116.6] = 116.6-5.96 = 110.64

7                                           116.6-[125.72-116.6] = 116.6-9.12 = 107.48

similarly others then find k for different readings by first order equation. k will be same for all readings.

plot the graph  b/w time and pressure to find order

and now  decide k by  using eqn of straight line ie  k= 2.303/t  X( log a/ a-x)

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