Question

Hu

請問第六題的莫耳生成熱該怎麼算？看不懂解答的意思

) 6. C(s) () + O2(g) → CO2(g) AH=-94.05 kcal; C(s) (E) + O2(g)
→
CO2(g) AH=-94.50 kcal ; CO(g) + Cl2(g) → COCl2(g) AH=-26.88 kcal;
2CO(g) + O2(g) → 2CO2(g) AH=-135.26 kcal.
求COCk(g)之莫耳生成熱為多少kcal?
(A)-53.75
(B) 53.75
(C) 14.33
(D)-53.30
(E) 20.60。
Jom food) AMERS
(09) (ETS) (8) d
(021
THE (86
VN
85
Hg A(A)
Og AS (8)
H&M g 8A (0)
20

6.
C(s) () + O2(g) → CO2(g) AH=-94.05 kcal
C(S)(石墨)
1
135.26
kcal
POST
2(2
CO2(g) → CO(g) + O2(g) AH=
CO(g)+O(g)
+) CO(g) +Cl2(g) → COCl2(g) AH = -26.88 kcal
1
2
002
OST
C(S)(石墨) + O2(g) +Cl2(g) → COCl2(g)
135.265
△H=-94.05-26.88+-
=-53.30 (kcal)
2