교과서 질문
Magnetite, an iron ore with formula Fe3O4, can be reduced by treatment with hydrogen to yield iron metal and water vapor.
d. This reaction has K = 2.3 × 10-18. Are the reactants or the products favored?
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7. Energy, Rate and Equilibrium
The Equilibrium Constant
Multiple Choice
State which is greater in amount: reactants or products, based on the given equilibrium constant, K.
a) N2 (g) + O2 (g) ⇌ 2 NO (g) K = 1.0 x 1020
b) 2 CO (g) + O2 (g) ⇌ 2 CO2 (g) K = 2.2 x 10-22
c) 2 BrCl (g) ⇌ Br2 (g) + Cl2 (g) K = 1
A
a) products, b) products, c) reactants
B
a) reactants, b) products, c) reactants
C
a) products, b) reactants, c) equal
D
a) reactants, b) products, c) equal
검증된 단계별 안내1
Understand the concept of the equilibrium constant (K). It is a measure of the ratio of the concentration of products to reactants at equilibrium. A large K value indicates that the equilibrium favors the formation of products, while a small K value indicates that the equilibrium favors the formation of reactants.
For part (a), the equilibrium constant K is 1.0 x 10^20, which is a very large number. This suggests that the concentration of products (NO) is much greater than the concentration of reactants (N2 and O2) at equilibrium.
For part (b), the equilibrium constant K is 2.2 x 10^-22, which is a very small number. This indicates that the concentration of reactants (CO and O2) is much greater than the concentration of products (CO2) at equilibrium.
For part (c), the equilibrium constant K is 1, which means the concentrations of reactants (BrCl) and products (Br2 and Cl2) are equal at equilibrium.
Based on the analysis of the equilibrium constants, the correct answer is: a) products, b) reactants, c) equal.
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