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Author Topic: Limiting reactant and yirld  (Read 782 times)

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nurikoned

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Limiting reactant and yirld
« on: December 13, 2017, 11:17:49 AM »


Limiting Reactant and Yield
Incomplete combustion of the fuel in a poorly tuned engine can produce toxic carbon monoxide along with the usual carbon dioxide and water. In a test of an off-road motor-cycle engine, 1,00 L of octane(of mass 702g) is burned and it was found that 1,84 kg of carbon dioxide is produced. What is the percentage yield of carbon dioxide?
Can anyone help me because it is my exam question
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sjb

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Re: Limiting reactant and yirld
« Reply #1 on: December 13, 2017, 07:46:03 PM »


Limiting Reactant and Yield
Incomplete combustion of the fuel in a poorly tuned engine can produce toxic carbon monoxide along with the usual carbon dioxide and water. In a test of an off-road motor-cycle engine, 1,00 L of octane(of mass 702g) is burned and it was found that 1,84 kg of carbon dioxide is produced. What is the percentage yield of carbon dioxide?
Can anyone help me because it is my exam question

What is the balanced equation for formation of carbon dioxide? How many moles of octane do you have - forming how many moles of carbon dioxide in your balanced equation? How many moles of carbon dioxide did you form?
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nurikoned

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Re: Limiting reactant and yirld
« Reply #2 on: December 13, 2017, 07:50:18 PM »

i must take c8h18+o2-co2+h2o+co or c8h18+o2-co2+h2o
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Borek

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Re: Limiting reactant and yirld
« Reply #3 on: December 13, 2017, 09:11:35 PM »

You are asked for a percentage yield, so you need to calculate theoretical yield - one for complete combustion.
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nurikoned

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Re: Limiting reactant and yirld
« Reply #4 on: December 14, 2017, 05:47:29 AM »

i mean that which one is correct equation
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Borek

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Re: Limiting reactant and yirld
« Reply #5 on: December 14, 2017, 11:28:53 AM »

Hint: can you produce CO in complete combustion?

Besides, only one of these equations can be balanced in a unique way.
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