consider-the-two-reactions-below-i-hbr-g-h2o-g-br-g-h3o-g-ii-hi-g-h2o-g-i-g-h3o-

Question

Consider the two reactions below:
i) HBr(g) + H₂O(g) ↔ Br^-(g) + H₃O⁺(g)
ii) HI(g) + H₂O(g) ↔ I^-(g) + H₃O⁺(g)
Calculate the enthalpies of reaction using bond enthalpies and identify if both reactions are exothermic or not.

Accepted Answer

i) -97 kJ/mol, ii) -164 kJ/mol, both are exothermic

Answer

i) 142 kJ/mol, ii) 542 kJ/mol, both are not exothermic

Answer

i) -451 kJ/mol, ii) 627 kJ/mol, both only i is exothermic

Answer

i) 560 kJ/mol, ii) -369 kJ/mol, both only ii is exothermic