Hexamethylenediamine (C 6 H 16 N 2 ) is one of the starting materials for the pr

Question

Hexamethylenediamine (C6H16N2) is one of the starting materials for the production of nylon. It can be prepared from adipic acid (C6H10O4) by the following overall reaction:

C6H10O4(l) + 2 NH3(g) + 4 H2(g) C6H16N2(l) + 4 H2O(l)

Click here to see the production of nylon.

What is the percent yield if 45.46 g hexamethylenediamine is made from 119.1 g adipic acid?

2.The production capacity for acrylonitrile (C3H3N) in the United States is over 2 billion pounds per year. Acrylonitrile, the building block for polyacrylonitrile fibers and a variety of plastics, is produced from gaseous propylene, ammonia, and oxygen:

2C3H6(g) + 2NH3(g) + 3O2(g) 2C3H3N(g) + 6H2O(g)

Assuming 100% yield, determine the mass of acrylonitrile which can be produced from the mixture below:

a.............   g = mass of acrylonitrile produced

What mass of water is formed from your mixture?

b.mass of water formed =............. g

c. Calculate the mass (in grams) of each reactant after the reaction is complete:

Mass Reactant 7.41×102 g propylene 5.00 x 102 g ammonia 1.00 x 103 g oxygen

Explanation / Answer

1 )

C6H10O4(l) + 2 NH3(g) + 4 H2(g) C6H16N2(l) + 4 H2O(l)

146 g                                                  116 g

146 g adipic acid -------------------->116 g nylon

119.1 g adipic acid -----------------> x g nylon

x = 119.1 x 116 / 146

x = 94.63 g

theoretical yield = 94.63 g hexamethylenediamine

actual yield = 45.46 g hexamethylenediamine

% yiled = (actual yield x 100 / theoretical yield )

             = (45.46 x 100 / 94.63)

             = 48.04 %

percent yield = 48.04 %

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