15.33 The equilibrium 2 NO(g) + Cl2(g) ⇌ 2 NOCI(g) is
established at 500 K. An equilibrium mixture of the three
gases has partial pressures of 0.095 atm, 0.171 atm, and
0.28 atm for NO, Cl2, and NOCI, respectively. (a) Calculate
K_p for this reaction at 500.0 K. (b) If the vessel has a vol-
ume of 5.00 L, calculate K_c at this temperature.