Hydrogen and iodine combine to produce hydrogen iodide in an exothermic reaction. The equation is shown. $\text{H}_2(g) + \text{I}_2(g) \rightleftharpoons 2\text{HI}(g)$ At equilibrium, a $1\,\text{m}^3$ reaction vessel contains $\text{H}_2$, $\text{I}_2$ and $\text{HI}$ gases. The temperature is altered so that the total pressure in the $1\,\text{m}^3$ vessel becomes twice as large. What is the effect on the value of $K_p$ and on the position of equilibrium?
- Adecreases; moves left
- Bincreases; moves right
- Cno change; moves left
- Dno change; no change