2C2H2 ( g ) +5O2 ( g ) 4CO2 ( g ) +2H2O ( g ) Part A Imagine that you have a 6.5

Question

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

Part A

Imagine that you have a 6.50 L gas tank and a 4.00 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 135 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:

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

Part A

Imagine that you have a 6.50 L gas tank and a 4.00 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 135 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.

Explanation / Answer

I am assuming temperature of both tank is same

From given equation,
mol of O2 = (5/2)*mol of C2H2
so,
P(O2)*V (O2) = (5/2)*P(C2H2)*V(C2H2)
135 atm * 6.50 L = (5/2)*P*4.00 L
P = 87.8 atm

Answer: 87.8 atm

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