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At 700 K, CCl4 decomposes to carbon and chlorine. The Kp value for the decomposition is 0.76. Find the starting pressure of CCl4 at this temperature that produces a total pressure of 1.9 atm at equilibrium.

Ralph Lopez

in Chemistry

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Kristi Hammond on August 14, 2018

The decomposition of CCl4 is as follows:CCl4 (g) ---> C(s) + 2Cl2 (g) Kp = 0.76 where Kp = (Pcl2)^2 / (P_CCl4)P_C is zero because the carbon is in solid form.Express P_CCl4 in terms of P_Cl20.76 = (P_Cl2)^2 / (P_CCl4)0.76P_CCl4 = (P_Cl2)^2Ptotal = P_Cl2 = 1.9 atmSolve to P_CCl4P_CCl4 = 4.75 atm


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