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Pani-rosa [81]
3 years ago
8

Hydrogen is prepared commercially by the reaction of methane and water vapor at elevated temperatures. CH4 (g) + H2 O(g) ⇌ 3H2 (

g) + CO(g) What is the equilibrium constant for the reaction if a mixture at equilibrium contains gases with the following concentrations: CH4 , 0.126 M; H2O, 0.242 M; CO, 0.126 M; H2 1.15 M, at a temperature of 760 °C?
Chemistry
1 answer:
Damm [24]3 years ago
8 0

Answer:

6.28

Explanation:

Let's consider the following reaction at equilibrium.

CH₄(g) + H₂O(g) ⇌ 3 H₂(g) + CO(g)

The concentration equilibrium constant (Kc) is the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.

Kc = [H₂]³ × [CO] / [CH₄] × [H₂O]

Kc = 1.15³ × 0.126 / 0.126 × 0.242

Kc = 6.28

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<u>Answer:</u> The mass of solution having 768 mg of KCN is 426.66 grams.

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We are given:

0.180 mass % of KCN solution.

0.180 %(m/m) KCN solution means that 0.180 grams of KCN is present in 100 gram of solution.

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Using unitary method:

If 0.180 grams of KCN is present in 100 g of solution.

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