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Topic: using the ideal gas loaw to solve stoichiometry problems  (Read 3293 times)

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Offline kerilynn

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using the ideal gas loaw to solve stoichiometry problems
« on: July 10, 2008, 04:07:11 PM »
What volume of oxygen, measured at 27 degrees C and 101.325 kPa, is needed for the combustion of 1.11 kg of coal? Assume coal is 100% carbon.

C(s) + O2(g) ------ CO2(g)


can u please work me all the way through this problem
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Offline Borek

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Re: using the ideal gas loaw to solve stoichiometry problems
« Reply #1 on: July 10, 2008, 04:17:33 PM »
This is simple stoichiometry - convert 1.11 kg of C to moles (hint: you will need moler mass of C for that), calculate how many moles of O2 you need (hint: how many moles of oxygen per 1 mole of C?) and use pV=nRT.

Answer calls for over two cubic meters of oxygen, if you are not close to that number, you are wrong.
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