Question 15.5 (Sixth Edition)

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Steve Magana 2I
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Joined: Fri Sep 28, 2018 12:24 am

Question 15.5 (Sixth Edition)

Postby Steve Magana 2I » Sun Mar 10, 2019 11:29 pm

Question: Ethene is a minor but important component of natural gas, and its combustion has been thoroughly studied. At a certain temperature and pressure, the unique rate of the combustion reaction C2H4(g) + 3 O2(g) --> 2 CO2(g) + 2 H2O(g) is 0.44 mol.L^-1.s^-1. (a) What is the rate at which oxygen reacts? (b) What is the rate of formation of water molecules?

Can someone help me with answering this question please? Thank you!

Tam To 1B
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Joined: Fri Sep 28, 2018 12:25 am

Re: Question 15.5 (Sixth Edition)

Postby Tam To 1B » Mon Mar 11, 2019 4:09 pm

Remember that the unique rate for aA + bB --> cC + dD is -1/a(d[A]/d[t]) + -1/b(d[B]/d[t]) --> 1/c(d[C]/d[t]) + 1/d(d[D]/d[t]).
You are given the unique rate 0.44 mol/Ls.
In order to find (a), you set 0.44 = 1/3(d[A]/d[t]), so to solve for (d[A]/d[t]), 0.44 * 3 = 1.3 mol O2/Ls.
You do the same for water but change the stoichiometric coefficient.

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