Qué cantidad de dióxido de carbono (CO2) se produce a partir de 5 gramos de propano (CO2) al 97% de pureza y 9 gramos de oxígeno (O2) con pureza del 77%, con un rendimiento de reacción del 94%.
C3H8 + O2 → CO2 + H2O
Respuestas
C3H8 + 5 O2 → 3 CO2 + 4 H2O
Propano (C3H8): 5 g al 97 %
Oxígeno (O2): 9 g al 77 %
Rendimiento: 94 %
Mm CO2 = 44 g/mol
O2 = 32 g/mol
calcular la masa de CO2 = ¿?
1. calcular gramos de O2
g O2 = 5 g C3H8 x 1 mol C3H8 x 5 mol O2 x 32 g O2 x 97 g
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44 g C3H8 1 mol C3H8 1 mol O2 100 g
g O2 = 17.63
2. calcular gramos de C3H8
g C3H8 = 9 g O2 x 1 mol O2 x 1 mol C3H8 x 44 g C3H8 x 77 g
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32 g O2 5 mol O2 1 mol C3H8 100 g
g C3H8 = 1.905
Reactivo Llimitante: O2
3. calcular gramos de CO2
g CO2 = 9 g O2 x 1 mol O2 x 3 mol CO2 x 44 g CO2
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32 g O2 5 mol O2 1 mol CO2
g CO2 = 7.425 (Rendimiento teórico)
4. calcular gramos de CO2
% Rend. = (Rend. Real / Rend. Teórico) x 100
despejar Rend. Real
Rend. Real = 94 % x 7.425 g
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100
Rend. real = 6.979 g CO2