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Question

: owLV2/ Online teaching and i × t/takeCovalentActivity.do?locator-assignment-take&takeAssignmentSessionLocator-assignment-take; Use the References to access important values if needed for this q The gas phase decomposition of dimethyl ether at 500 °C CH3OCH 3(g) CH4(g) + H2(g) + CO(g) is first order in CH3OCH3. During one experiment it was found that when the initial concentration of CH,OCH, was 3.09x102 M, the concentration of CH3OCH3 dropped to 3.21x103 M after 3772 s had passed. Based on this experiment, the rate constant for the reaction is 2 more group attempts remaining

Explanation / Answer

CH3OCH3 (g)-------------- CH4(g) + H2(g) + CO(g)

[A]0=3.09x10^-2M

[A]t= 3.21x10^-3

t= 3772 s

for first order reaction

K= 2.303/t xlog[A]0/[A]t

K= 2.303/3772 x log(3.09x10^-2)/(3.21x10^-3)

K = 2.303/3772 x0.983

K= 6.0x10^-4 s-1

Rate constant = 6.0x10^-4 s-1

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