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화학/열역학

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

by 영원파란 2019. 9. 25.

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헤스법칙. N2O(g) + NO2(g) 3NO(g) 반응엔탈피 계산

 

 

Determine the value of the enthalpy change, ΔH_rxn, for the reaction N2O(g) + NO2(g) 3NO(g)

(1) 2NO(g) N2(g) + O2(g) ... ΔH = -181 kJ/mol

(2) 2N2O(g) 2N2(g) + O2(g) ... ΔH = -163 kJ/mol

(3) NO(g) + 1/2 O2(g) NO2(g) ... ΔH = -57 kJ/mol

 

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

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(2’) N2O(g) N2(g) + 1/2 O2(g) ... ΔH = (-163 kJ/mol)/2

(3’) NO2(g) NO(g) + 1/2 O2(g) ... ΔH = +57 kJ/mol

(1’) N2(g) + O2(g) 2NO(g) ... ΔH = +181 kJ/mol

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(SUM) N2O(g) + NO2(g) 3NO(g)

 

 

(-163/2) + (+57) + (+181) = +156.5 kJ/mol

 

 

: +156.5 kJ/mol

 

 

 

[ 관련 예제 https://ywpop.tistory.com/12069 ] 헤스법칙. N2O(g) + NO2(g) 3NO(g) 반응엔탈피 계산.

 

 

 

[키워드] N2O + NO2 3NO, hess_law_rxn_enthalpy_ref

 

 

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