SELECT * FROM question_mgmt as q WHERE id=1823 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) CBSE Free NCERT Solution of 12th chemistry Chemical Kinetics the decomposition of dimethyl ether leads to the f

Question:

The decomposition of dimethyl ether leads to the formation of CH4, H2and CO and the reaction rate is given by

Rate = k [CH3OCH3]3/2

The rate of reaction is followed by increase in pressure in a closed vessel, so the rate can also be expressed in terms of the partial pressure of dimethyl ether, i.e.,

 Rate = k (PCH3OCH3)3/2

If the pressure is measured in bar andtime in minutes, then what are the units of rate and rate constants?

Answer:

If pressure is measured in bar and time in minutes, then

Unit of rate = bar min - 1

Rate = k (PCH3OCH3)3/2

⇒ k = Rate / (PCH3OCH3)3/2

Therefore, unit of rate constants (k) = bar min-1  / bar3/2

= bar-½ min - 1


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