ΔH 계산. ΔH°_f(C2H3O2^-, aq) 계산

ΔH 계산. ΔH°_f(C2H3O2^-, aq) 계산

 

 

Na^+(aq) + C2H3O2^-(aq) + 3H2O(l)

→ NaC2H3O2*3H2O(s) ... ΔH°_rxn = –19.7 kJ/mol

 

> ΔH°_f(Na^+, aq) = –239.7 kJ/mol

> ΔH°_f(NaC2H3O2*3H2O, s) = –710.4 kJ/mol

> ΔH°_f(H2O, l) = –285.9 kJ/mol

 

---------------------------------------------------

 

▶ 참고: 반응 엔탈피 계산 방법 2가지

[ https://ywpop.tistory.com/13107 ]

 

 

 

ΔH°_rxn = [생성물들의 ΔH°_f 합] – [반응물들의 ΔH°_f 합]

( 참고 https://ywpop.tistory.com/3431 )

 

–19.7 = [(–710.4)] – [(–239.7) + ? + 3(–285.9)]

 

? = (–710.4) + 239.7 + 3(285.9) + 19.7

= +406.7

 

 

 

답: +406.7 kJ/mol