Question

sử dụng đl Hess tính \(\Delta H\)

Bài 1:

Ca(s) + \(\frac{1}{2}\)O₂(g) -> CaO(s) \(\Delta H=-635,1kJ\)

CaCO₃(s)-> CaO(s) + CO₂(s) \(\Delta H=178,3kJ\)

Ca(s) + \(\frac{1}{2}\)O₂ + CO₂ -> CaCO₃(s) \(\Delta H=?\)

Bài 2:

\(\frac{1}{2}\)N₂ + \(\frac{1}{2}\)O₂(g)->NO(g) \(\Delta H=90,3KJ\)

NO(g) + \(\frac{1}{2}\)Cl₂ -> NOCl(g) \(\Delta H=-38,6kJ\)

2NOCl(g)-> N₂(g) + O₂(g) + Cl₂ \(\Delta H=?\)

Bài 3:

Fe₂O₃(s) + CO(g) -> Fe(s) + CO₂(g) \(\Delta H=?\)

(1) Fe₂O₃(s) + CO₂(g) ->3FeO(s) + CO(s) \(\Delta H^O=-48,5kJ\)

(2) Fe(s) + CO₂(g) -> FeO(s) + CO(g) \(\Delta H^O=-11,0kJ\)

(3) Fe₃O₄(s) + CO(g)-> 3FeO(s) + CO₂(g) \(\Delta H^O=22kJ\)

Bài 4:

CIF(g) + F₂(g) -> CIF3 (I) \(\Delta H=?\)

(1) 2CIF(g) + O₂(g) -> Cl₂O(g) + OF(g) \(\Delta H_{rxn}^O=167,5kJ\)

(2) 2F₂(g) + O₂(g) -> Cl₂O(g) \(\Delta H_{rxn}^O=-43,5kJ\)

(3) 2CIF₃(l) + 2O₂(g) -> Cl₂O(g) + 3OF₂(g) \(\Delta H_{rxn}^O=394,1kJ\)

Bài 5:

(1) NO(g) + NO₂(g) -> N₂O₃(g) \(\Delta H_{rxn}^O=-39,8kJ\)

(2) NO(g) + NO₂(g) + O₂(g)-> N₂O₅(g) \(\Delta H_{rxn}^O=-112,5kJ\)

(3) 2NO₂(g)->N₂O₄(g) \(\Delta H_{rxn}^O=-57,2kJ\)

(4) 2NO(g) + O₂(g) -> 2NO₂(g) \(\Delta H_{rxn}^O=-114,2kJ\)

(5) N₂O₅(s) -> N₂O₅(g) \(\Delta H_{rxn}^O=54,1kJ\)

N₂O₃(g) + N₂O₅(s) -> 2N₂O₄(g) \(\Delta H=?\)

Answer 1

A vào đây tìm hiểu rồi làm nhé!

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