Medium
For the reaction $2HI_{(g)} \rightleftharpoons H_{2(g)} + I_{2(g)}$,the equilibrium constant $K$ at room temperature is $2.85$,and at $698 \ K$ it is $1.4 \times 10^{-2}$. This indicates that:
- A$HI$ is an acidic compound.
- B$HI$ is very stable at room temperature.
- C$HI$ is less stable relative to $H_2$ and $I_2$.
- D$HI$ possesses resonance stability.
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