Question

The bond dissociation energy of h2, cl2 and hcl are 104,58 and 103

Answer 1

 H2 → 2H 104 kcal, so 1/2 H2 → H 52 kcal 
Cl2 → 2Cl 58 kcal, so 1/2 Cl2 → Cl 29 kcal 
HCl → H + Cl 103 kcal, so H + Cl → HCl = -103 kcal 

Add the last 3 equations together: 

1/2 H2 → H, 52 kcal 
1/2 Cl2 → Cl, 29 kcal 
H + Cl → HCl, -103 kcal 
——————————— 
1/2 H2 + 1/2 Cl2 + H + Cl → H + Cl + HCl, -22 kcal 
1/2 H2 + 1/2 Cl2 → HCl, -22 kcal

Hope this helps you!! :)

Answer 2

${\huge{\blue{\boxed{\boxed{\pink{\underline{\underline{\mathfrak{\red{ ♡ANSWER ♡  }}}}}}}}}}$

$\huge\color{Pink}\boxed{\colorbox{Black}{♡HOPE IT HELPS YOU ♡}}$