Acetylene torches are used for welding These torches use a m

Acetylene torches are used for welding These torches use a modure of acetylene gas, CHa, and oxygen gas, O to produce the folowing combustion reaction Imagne tat yo. have a 700 L gestark and a 2.50 L gastark You need to fu one tak·ith arygen.nd the er wth aoetyere to use in conjunct your welding torch. you l the langer tank with oxygen to a pressure of 145 atm, to what pressure should you fil the acetylene tank to ensure that y out of each gas at the same time? Assume ideal behavior for al gases Express your answer with the appropriate units View Avalilable Hints) P Value Units

Solution

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

from the balanced equation it is clear that

the ratio of the acetylene and O2 is 2:5 or

one mole of O2 required 2/5 moles of Acetylene

no of moles of O2 = 125 atm x 5.50 L = 687.5 L = 687.5 / 22.4 = 30.7 mol

from the balanced equation

no of moles of C2H2 = 2/5 (30.7) = 12.3 mol

convert in to liters = 12.3 x 22.4 = 275 L

now the pressure is 275 / 2.5 = 110 atm