At equilibrium, the partial pressure of S8 in the reaction 1g2 ? 4s 1g2 82 at 1325 K is 0.25 atm. What is the equilibrium constant (Kp) for this reaction?
a) 0.25 atm
b) 1.00 atm
c) 2.00 atm
d) 4.00 atm