RE: #Chemistry Challenge 5

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#Chemistry Challenge 5

in steemstem •  7 years ago  (edited)

Yes, right, but first you had another volume and also another mass of CO2. Better is to add a new comment if you change any parts of your solutions.

Concerning part 4: if any information seems to be missing you can use every given detail from parts 1 to 3 to find it out.
So far your answer is wrong.

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How about:
v(C8H18) = - 32.89 mol/hr

  ·  7 years ago (edited)

NOT correct! :-)

But apart from that so far you did well ... :)

Edit: by the way, the reaction speed v is not negative (even if ∆c is negative), but that's not the point: your number is wrong, too.

humm... if you are expecting the answer in concentration:
[CO2] = 4.734 x 10-2 mol dm-3
implies rate of CO2 production = 6.7 x 10-3 mol dm-3 hr-1
implies speed of dissipating isooctane = 8.37 x 10-4 mol dm-3 hr-1

Thanks for letting us know about the concentration of carbon dioxide.

  ·  7 years ago (edited)

How exactly do you get
c(CO2) = 4.734 x 10-2 mol/dm3?

  ·  7 years ago (edited)

Nah.... sorry for getting so many typo
[CO2] = 1596.78 mol / 3.92 x 10 4 dm3
= 4.0734 x 10-2 mol dm-3
But the rest should be the same

  ·  7 years ago (edited)

:)
This result is the (lower) concentration of CO2 when it was emitted as a gas already ... but gasoline is a liquid ...

Ya, so why I am wondering what unit you are expecting
Speed of reaction: defined as how quickly or slowly a reaction takes place
(So my very initial attempt was in liter per hour)

As you wrote yourself, reaction speed is measured in v = ∆c/∆t (and if it is an educt: v = - ∆c/∆t, because ∆c is negative, so with the additional minus v itself stays positive).