헤스법칙. N2O(g) + NO2(g) → 3NO(g) 반응엔탈피 계산

헤스법칙. N2O(g) + NO2(g) → 3NO(g) 반응엔탈피 계산

 

 

Use Hess’s Law to calculate ΔH for the reaction N2O(g) + NO2(g) → 3NO(g)

(1) N2(g) + O2(g) → 2NO(g) ... ΔH = +180.7 kJ

(2) 2NO(g) + O2(g) → 2NO2(g) ... ΔH = -113.1 kJ

(3) 2N2O(g) → 2N2(g) + O2(g) ... ΔH = -163.2 kJ

 

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▶ 참고: 헤스의 법칙 https://ywpop.tistory.com/3376

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(3’) N2O(g) → N2(g) + 1/2 O2(g) ... ΔH = (-163.2 kJ)/2

(2’) NO2(g) → NO(g) + 1/2 O2(g) ... ΔH = (+113.1 kJ)/2

(1) N2(g) + O2(g) → 2NO(g) ... ΔH = +180.7 kJ

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(SUM) N2O(g) + NO2(g) → 3NO(g)

 

 

(-163.2/2) + (+113.1/2) + (+180.7) = +155.65 kJ

 

 

답: +155.65 kJ

 

 

 

[ 관련 예제 https://ywpop.tistory.com/12073 ] 헤스법칙. N2O(g) + NO2(g) → 3NO(g) 반응엔탈피 계산.

 

 

 

[키워드] N2O + NO2 → 3NO, hess_law_rxn_enthalpy_ref