Question

290K,100Kpa时,已知；2H2O(g)=o2（g）+2H2(g)△H1 Cl2（g)+H2(g)=2Hcl(g△

Answer 1

2H2O(g) = O2 (g) + 2H2(g) (1) △H1

Cl2(g) + H2(g) = 2HCl (g) (2) △H2

2Cl2 (g) + 2H2O (g) = 4HCl (g) + O2 (g) (3) △H3

(1)+2*(2),两边消去H2,得到 (3) ,所以△H3 = △H1+2△H2