[Nitin_Naudiyal]

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 P_i = Initial Pressure of ethylene oxide and P_A = Partial Pressure of ethylene Oxide at time t.
If x = decrease in pressure in ethylene oxide all at time t then P_A = P_i - 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?

[curiouscat]

Write the balanced eq. first.

[Nitin_Naudiyal]

Write the balanced eq. first.

C₂H₄O_(g) :rarrow:CH_4(g) + CO_(g)

[curiouscat]

Show your attempt. What eq. do you know.

[Nitin_Naudiyal]

Show your attempt. What eq. do you know.

Here, Let Pi = Initial Pressure of ethylene oxide and P_A = Partial Pressure of ethylene Oxide at time t.
If x = decrease in pressure in ethylene oxide all at time t then P_A = Pi - x

Then, P = P_A + x + x = Pi - x + x + x = Pi + x
Hence,x = P - Pi

Thus, P_A = Pi - x = Pi - P + Pi  = 2Pi - P

[curiouscat]

The answer I get is "will increase by x each"