Acetylene Heating
 Smith NE180-4 Air Acetylene Soldering Tip Torch Heat Braze Rosebud US $26.50 
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 Smith NE180 Torch Handle. Air Acetylene Soldering Heat Braze Rosebud US $28.00
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The gaseous hydrocarbon acetylene, C2H2, is used in welders' torches because of the large amount of heat relea
The gaseous hydrocarbon acetylene, C2H2, is used in welders' torches because of the large amount of heat released when acetylene burns with oxygen.
2 C2H2(g) + 5 O2(g)= 4 CO2(g) + 2 H2O(g)
How many grams of oxygen gas are needed for the complete combustion of 150. g of acetylene?
2 C2H2(g) + 5 O2(g)= 4 CO2(g) + 2 H2O(g)
2 mol of C2H2 react with 5 mol of O2. Therefore, converting to mass:
molar mass C2H2: 26 g/ mol
molar mass O2: 32 g/mol
For C2H2:
26g ------ 1 mol
x ------ 2 mol
x= 52 g
For O2:
32g ----- 1 mol
y ------ 5 mol
y= 160 g
So:
52g of C2H2 (2mol) ----------- 160g of O2(5 mol)
m ------------ 150g
m= 48.75 g of C2H2
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