A reaction vessel is charged with hydrogen iodide, which partially decomposes to molecular hydrogen and iodine:
2 H I ( g ) ⟺ H 2 ( g ) + I 2 ( g )
When the system comes to equilibrium at 425°C, P H I = 0.708 atm and P H 2 = P I 2 = 0.0960 atm. What is the value of Kp at this temperature?\
1.84 x 10-2
6.80 x 10-2
1.30 x 10-2
Kp cannot be calculated for this gas reaction when the volume of the reaction vessel is not given.