Question

The equilibrium constant, K for the reaction 2HI_(g)H_2(g) + I_2(g); at room temperature is 2.85 and that at 698 K is 1.4 × 10^–2 . This implies that –

• A. HI is exothermic compound
• B. HI is very stable at room temperature
• C. HI is relatively less stable than H₂ and I₂
• D. HI is resonance stabilized

Answer 1

Answer: (C)

HI is relatively less stable than H₂ and I₂

Answer 2

K_C decreases with temperature i. e, reaction is exothermic or energy of HI is more than H₂ and I₂ or HI is less stable than H₂, I₂.