A sample of carbonyl bromide is sealed in a 150.0-cm^3 glass bulb to which a pre

Question

A sample of carbonyl bromide is sealed in a 150.0-cm^3 glass bulb to which a pressure gauge is attached The bulb is heated to 73.0 degree C, and the gauge shows that the pressure in the bulb rises to 0.883 atm. At this temperature the COBr_2 (g) is partially dissociated into CO(g) and Br_2 (g)according to the equation COBr_2 (g) CO(g) + Br_2(g) At 73.0 degree C. K_p = 5.40 for this reaction that the contents of the bulb are at equilibrium and calculate the partial pressure of the three different chemical species in the vessel.

Explanation / Answer

           COBr2(g) -------------> CO(g) + Br2(g)

I          0.883                           0            0

C        -x                                 +x           +x

E         0.883-x                        +x           +x

         kp   = PCO PBr2/PCOBr2

        5.4     = x*x/0.883-x

         5.4(0.883-x) = x^2

          x = 0.77

        PCOBr2   = 0.883-x =0.883-0.77 = 0.113atm

       PCO           = x           = 0.77atm

     PBr2           = x           = 0.77atm

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