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Mula² : 5mol/3L
Reaksi : 5x0,4
= -2 mol/3L +1 mol/3L +3 mol/3L
Setimbang: 3mol/3L 1 mol/3L 3 mol/3L
Jumlah Mol Kesetimbangan = 3 + 1 + 3 = 7 mol
Tekanan Total (Pt) = 3,5 atm
Maka: P(NH₃) = 3,5 x 3/7 = 1,5 atm
P(N₂) = 3,5 x 1/7 = 0,5 atm
P(H₂) = 3,5 x 3/7 = 1,5 atm
Jadi: Kp = (P.N₂)(P.H₂)³/(P.NH₃)²
= (0,5)(1,5)³/(1,5)²
= 0,75 atm²