Q7 of 27 Page 1

For a reaction, C2H4 (g) + H2(g) → C2H6(g), rate = 5.5 10-14 [C2H4].

(a) Write the unit of rate constant.


(b) Calculate its half-life (t1/2).


(a) Hydrogenation of ethene is an example of first order reaction. Thus, unit of rate constant will be sec-1.


(b) Half life for 1st order reaction, t1/2 =


t1/2 =


t1/2 = 0.126 sec


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