A vessel at 100 K contains CO ₂ with a pressure of 0.5 atm . Some of the CO ₂ is converted into CO on addition of graphite. Calculate the value of K_p if the total pressure at equilibrium is 0.8 atm .

Step-by-step solution

CO ₂( ~g )+ C ( s ) 2 CO ( g ) array cll 0.5 & 0 & 0 (0.5-P) & 0 & 2 P array Pressure at equilibrium =0.8=0.5-P+2 P P =0.3 ~atm K _ p = ( P _ CO )^2 P _ CO ₂ = (0.6)^2 (0.2) =1.8 ~atm