Question

Diketahui data energi ikatan rata rata
H-H = 436 kj/mol
Br-Br = 193 kj/mol
H-Br = 366 kj/mol
hitunglah delta Hf HBr!
sama caranya yaa..

Answer 1

H₂ + Br₂ ⇒ 2HBr

[(H-H) + (Br-Br)] - [2(H-Br)]
= (436 + 193) - 2(366)
= 629 - 732
= - 103 kJ/mol