Question

Acetaldehyde decomposes to methane and carbon monoxide according to the following balanced equation: CH3CHO → CH4...

Acetaldehyde decomposes to methane and carbon monoxide according to the following balanced equation:
CH3CHO → CH4 + CO
In a particular experiment, the following kinetic data for the decomposition of acetaldehyde were obtained:

Time(s) 0 1000 2000 3000 4000
[CH3CHO] (M) 0.2160 0.1095 0.0734 0.0552 0.0442

What is the value of the rate constant at the temperature of this experiment?
Give an answer with concentration units of molarity and time units of seconds.

Science   Chemistry   
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Homework Answers

Answer #1

When you plot a graph of

1 / [Concentration] vs time

Your slope is the rate constant.

[CH3CHO] 1/[CH3CHO]

0.216    4.62962963
0.1095    9.132420091
0.0734    13.6239782
0.0552    18.11594203
0.0442    22.62443439

Now ploting the graph , we get slope = 0.0045 (as shown in the graph).

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