Welding Torch
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acetylene torches are used for welding. These torches use a mixture of acetylene gas, C_2H_2 rm, g of oxygen?
Imagine that you have gas tank and a 2.50 L 7.00 L gas tank. You need to fill a tank of oxygen and the other with acetylene for use in connection with the torch. If you fill the tank larger with oxygen at a pressure of 155 atmospheres, so the pressure must complete acetylene tank to make sure you run out of gas at the same time? Assume ideal behavior for all gases.
+ 4CO2 + 2H2O 2C2H2 So 5O2 -> requires 5 mol O2 and 2 moles of C2H2, or 2 / 5 of the amount of O2 and O2 C2H2: 155 atm * 7 l = 1085 l => 1085/22.4 = 48.4 mol C2H2: it takes 48.4 * 2.5 = 19.4 mol, which is 4.19 * 4.22 = 434 l So the pressure is 434/2.5 = 174 atm
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