Chemical Forums
Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: Nitin_Naudiyal on December 05, 2012, 02:01:08 AM
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Please Help me with the Following Question.
For the Decomposition of Ethylene Oxide into CH4 and CO, the variation of total pressure P of the reaction Mixture with time is given below:
t/s P/mm
0 120
300 127.2
600 134
900 140.3
Show that the reaction is First order?
Here, Let Pi = Initial Pressure of ethylene oxide and PA = Partial Pressure of ethylene Oxide at time t.
If x = decrease in pressure in ethylene oxide all at time t then PA = Pi - x
My question is -
If the pressure of ethylene oxide decreases by x at time t, then pressure of CH4 and CO will increase by x each, or by x/2 each?
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Write the balanced eq. first.
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Write the balanced eq. first.
C2H4O(g) :rarrow:CH4(g) + CO(g)
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Show your attempt. What eq. do you know.
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Show your attempt. What eq. do you know.
Here, Let Pi = Initial Pressure of ethylene oxide and PA = Partial Pressure of ethylene Oxide at time t.
If x = decrease in pressure in ethylene oxide all at time t then PA = Pi - x
Then, P = PA + x + x = Pi - x + x + x = Pi + x
Hence,x = P - Pi
Thus, PA = Pi - x = Pi - P + Pi = 2Pi - P
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The answer I get is "will increase by x each"