If the bond energies of H - H , Br - Br , and H - Br are 433,192 and 364 ~kJ / mol ⁻¹ respectively, the H ^ for the reaction H _ 2(g) + Br _ 2(g) 2 HBr _ (g) is:

Question

Quantrex Academy · Accepted Answer

Correct answer: D. -103 ~kJ

H - H + Br - Br 2 H - Br array rrr 433+192 & 2 & 364 =625 & =728 array Energy absorbed Energy released Net energy released = H _ R - H _ p =625-728=-103 ~kJ . Related Theory Fluorine has high bond energy because it is smallest among these molecules so it is tightly bonded to other atoms due to greater nuclear charge.

If the bond energies of H - H , Br - Br , and H - Br are 433,192 and 364 ~kJ / mol ⁻¹ respectively, the H ^ for the reaction H _ 2(g) + Br _ 2(g) 2 HBr _ (g) is:

Options

Correct answer

Step-by-step solution

More from Thermodynamics (C)