The Kp for the production of phosgene is 18.0. If one mole each of CO and...

3.8 Ratings (656 Votes)

Â Â Â Â Initial partial preesure of CO = ( moles of CO / total moles ) x total pressure = ( 1/1+1) x 1 atm = 0.5 atm

Â Â Â Â Initial partial preesure of Cl2 = ( moles of Cl2 / total moles ) x total pressure = ( 1/1+1) x 1 atm = 0.5 atm Â Â Â Â Â Â Â Â Â Â Â Â

CO(g) +Â Â Â Cl2(g)Â Â Â <=>Â Â Â COCl2(g)

InitialÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0.5 atm Â Â Â Â Â Â 0.5 atm Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 0

At equilibriumÂ Â Â Â Â Â Â Â Â Â 0.5-xÂ Â Â Â Â Â Â Â Â Â 0.5-xÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â x

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Kp = x / (0.5-x) (0.5-x)

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 18 = x / (0.5-x)²

^{Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â} 18x² -18x +4.5 = x

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 18x² -19x +4.5 = 0

On solving,

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â x = 0.385 atm

Therefore,

partial pressure of COCl2 after equilibrium is reached = x = 0.385 atm

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