SELECT * FROM question_mgmt as q WHERE id=1845 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=3 AND subId=9 AND chapterId=59 and ex_no='2' AND status=1 ORDER BY CAST(question_no AS UNSIGNED)

Question:

The decomposition of hydrocarbon follows the equation

k = (4.5 x 1011 s-1) e-28000 K/T

Calculate Ea.

Answer:

The given equation is

k = (4.5 x 1011 s-1) e-28000 K/T           (i)

Arrhenius equation is given by,

k= Ae -Ea/RT                                                (ii)

From equation (i) and (ii), we obtain

Ea  / RT  =  28000K / T

⇒ Ea  = R x 28000K 

= 8.314 J K - 1mol - 1× 28000 K

= 232792 J mol - 1

= 232.792 kJ mol - 1


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