At 500 K the equilibrium has

CHEMISTRY · Single correct · A Level · Chemistry · Gaseous equilibria (Kp) · Gaseous equilibria (Kp)

Problem

At 500 K the equilibrium 2 NOCl(g)⇌2 NO(g)+Cl2(g)\mathrm{2\,NOCl(g)\rightleftharpoons 2\,NO(g)+Cl_2(g)} has Kp=0.67K_p=0.67. A sealed container at this temperature contains the equilibrium mixture PNOCl=1.00 atmP_{\mathrm{NOCl}}=1.00\,\text{atm}, PNO=1.10 atmP_{\mathrm{NO}}=1.10\,\text{atm}, and PCl2=0.55 atmP_{\mathrm{Cl_2}}=0.55\,\text{atm}. The volume of the container is then instantaneously doubled at constant temperature. After the system reaches the new equilibrium, what is the partial pressure of NOCl\mathrm{NOCl}? (a) 0.50 atm0.50\,\text{atm} (b) 0.30 atm0.30\,\text{atm} (c) 0.43 atm0.43\,\text{atm} (d) 0.38 atm0.38\,\text{atm}

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