Gas Stoichiometry Video Lessons

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Problem: Imagine that you have a 6.00 L gas tank and a 2.00 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 125 atm, to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.Express your answer with the appropriate units.Acetylene torches are used for welding. These torches use a mixture of acetylene gas, C2H2, and oxygen gas, O2 to produce the following combustion reaction:2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g)

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Problem Details

Imagine that you have a 6.00 L gas tank and a 2.00 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 125 atm, to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.

Express your answer with the appropriate units.


Acetylene torches are used for welding. These torches use a mixture of acetylene gas, C2H2, and oxygen gas, O2 to produce the following combustion reaction:

2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g)

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Based on our data, we think this problem is relevant for Professor Iles' class at SLCC.