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orlando19882000
29.01.2021 •
Chemistry
Propane reacts with elemental oxygen gas according to the unbalanced reaction, C3H8(g) + O2(g) → CO2(g) + H2O(l). What is the coefficient of the water, H2O(l), in the balanced reaction?
a
2
b
4
c
6
d
8
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Ответ:
b. 4
Explanation:
The reaction expression is given as:
C₃H₈ + O₂ → CO₂ + H₂O
To solve this problem, we employ a mathematical approach.
Now use coefficient a, b, c and d as the numbers that will balance the expression:
aC₃H₈ + bO₂ → cCO₂ + dH₂O
Conserving C: 3a = c
H: 8a = 2d
O: 2b = 2c + d
let a = 1, c = 3, d = 4 , b = 5
The balanced reaction expression is:
C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
Ответ:
(a) CS₂ = 0.331, CCl₄ = 0.669; (b) 102 g/mol; (c) 49.1 kmol/h
Explanation:
Assume 5000 kg of mixture.
(a) Mole fractions
(i) Mass of each compound
Mass of CCl₄ = 2500 kg
Mass of CS₂ = 2500 kg
(ii) Moles of each compound
(iii) Mole fractions
Total moles = 16.3 kmol + 32.8 kmol = 49.1 kmol
The major component is usually called the solvent — Component 1 —carbon disulfide.
(c) Average molar mass
The average molar mass is the weighted molar mass of each component.
(d) Feed rate