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Given the following chemical equilibria,
N2(g) + 3 H2(g) f 2 NH3(g) K1
4 NH3(g) + 5 O2(g) f 4 NO(g) + 6 H2O(g) K2
H2(g) + 1/2 O2(g) f H2O(g) K3
Determine the equilibrium constant for the reaction below.
N2(g) + O2(g) f 2 NO(g) K4
| K4 = K1 ´ K2 ´ K3 |
| K4 = K1K2K3 |
Expert Answer
Answer
N2(g) + 3 H2(g) f 2 NH3(g) K1 ….eqn 1
4 NH3(g) + 5 O2(g) f 4 NO(g) + 6 H2O(g) K2 ….eqn 2
H2(g) + 1/2 O2(g) f H2O(g) K3 ….eqn 3
N2(g) + O2(g) f 2 NO(g) K4 ….eqn 4
lets write eqn 4 in terms of eqn 1,2,3
eqn 4 = eqn 1 + 1/2*eqn 2 – 3* eqn 3
so,
k4 = k1*(k2)^1/2 / k3^3
K4 = K1*sqrt (K2) / K3^3
