Lexan is a plastic used to make compact discs, eyeglasslenses, bullet-proof glas

Question

Lexan is a plastic used to make compact discs, eyeglasslenses, bullet-proof glass. One of the compounds used to make Lexanis phosgene (COCl2), an extremely poisonous gas. Phosgene decomposes by the reaction COCl2(g)= CO(g)+Cl2(g) for which Kp=6.8x10^-3 at 100 C. If pure phosgene at aninitial pressure of 1.0 atm decomposes, calculate the equilibriumpressures of all species. Lexan is a plastic used to make compact discs, eyeglasslenses, bullet-proof glass. One of the compounds used to make Lexanis phosgene (COCl2), an extremely poisonous gas. Phosgene decomposes by the reaction COCl2(g)= CO(g)+Cl2(g) for which Kp=6.8x10^-3 at 100 C. If pure phosgene at aninitial pressure of 1.0 atm decomposes, calculate the equilibriumpressures of all species.

Explanation / Answer

                           COCl2(g)-----> CO(g)+Cl2(g) Initial(atm)               1.0                    0         0 change(atm)             -x                     +x         +x Equilibrium (atm) ( 1-x)                     x            x Kp = 6.8 * 10-3 = x. x / (1-x) Solving , we get x = 0.0791 atm So equilibrium pressures for CO = 0.0791 atm for Cl2 = 0.0791 atm for COCl2 = 1 - 0.0791 = 0.9209 atm

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