If the following reaction was used to produce hydrogen gas and the carbon dioxide is vented...
If the following reaction was used to produce hydrogen gas and the carbon dioxide is vented to the atmosphere, what is the % atom economy? CH4+2 H2O--->CO2+4 H2
Homework Answers
CH4+2 H2O--->CO2+4 H2
Using the atomic masses of H = 1, C = 12, O = 16, we can calculate the atom economy .
the reaction equation can be expressed in terms of theoretical reacting mass units
[(12 ) + 4(1)] + [2 x (2 + 16)] ===> [12 +2 x 16] + [4 x (2)]
[16 of CH4] + [36 of H2O] ===> [44 of CO2] + [8 of H2]
so there are a total of 8 mass units of the useful/desired product H2
out of a total mass of reactants or products of 16 + 36 = 44 + 8 = 104
| TOTAL FORMULA MASSES of USEFUL PRODUCT | |
|
ATOM ECONOMY = 100 x |
----------------------------------------------------------------------------------- |
| TOTAL FORMULA MASSES of all REACTANTS |
Therefore the atom economy = 100 x 8 / 104 = 7.69 %
I JUST COPIED FORMULA... HOPE ITS CORRECT
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