Chemical EquilibriumHard

Question

A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of graphite. If the total pressure at equilibrium is 0.8 atm, the value of K is

Options

A.3 atm
B.0.3 atm
C.0.18 atm
D.1.8 atm

Solution


                                  CO2(g) + C → 2CO(g)
Initial moles                        p                    O
Equilibriumm moles         p-x                 2x
Total pressure at equilibrium = 0.8 atm ; Total no.of moles = p + x.
Therefore p ∝ n;        ⇒ x = 0.3
Kp = = 1.8 atm

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