When a sample of $\text{HI}$ is heated to a specific temperature, the equilibrium shown below is attained. $2\text{HI}(g) \rightleftharpoons \text{H}_2(g) + \text{I}_2(g)$ At this temperature, the partial pressure of $\text{HI}(g)$ is $28$ times that of $\text{H}_2(g)$. Determine the value of $K_p$ at this temperature?
- A$1.28 \times 10^{-3}$
- B$0.035$
- C$28$
- D$784$