Hydrogen chloride (HCl) reacts with oxygen (O2) produces water (H2O) and chlorine (Cl2). The reaction is held in gas phase at 500C and 2 bar. If the system initially contains 5molHCl for each mole of O2, what is the composition of the system at equilibrium? Assume ideal gases; and consider O2 as the key component in the reaction formula (i.e., set its stoichiometric coefficient to unity). (Ans. yHCl=0.3508;yO2=0.0397;yH2O=0.3048;yCl2=0.3048 )