Diketahui : MO₂ + CO -> MO + CO₂ delta H = -20 KJ M₃0₄ + CO -> 3MO + CO₂ delta H = + 6 KJ 3M₂O₃ + CO -> 2M₃O₄ + CO₂ delta H = -12 kj nilai delta H untuk reaksi 2MO₂ + CO -> M₂O₃ + CO₂ adalah ... kj a. -40 b. -28 c. -26 d. - 18 e. + 18
Risep
2 MO₂ + 2 CO -> 2 MO + 2 CO₂ ΔH = -20 x2 = -40 Kj 2 MO + 2/3 CO₂ -> 2/3 M₃0₄ + 2/3 CO ΔH = - 6 x 2/3 = -4 Kj 2/3 M₃O₄ + 1/3 CO₂ -> M₂O₃ + 1/3 CO ΔH = +12/3 = + 4 Kj + 2MO₂ + CO -> M₂O₃ + CO₂ ΔH = -40 Kj
2 MO + 2/3 CO₂ -> 2/3 M₃0₄ + 2/3 CO ΔH = - 6 x 2/3 = -4 Kj
2/3 M₃O₄ + 1/3 CO₂ -> M₂O₃ + 1/3 CO ΔH = +12/3 = + 4 Kj +
2MO₂ + CO -> M₂O₃ + CO₂ ΔH = -40 Kj
yang dibold bisa saling dicoret