8)At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO an

Question

8)At high temperatures phosgene (COCl2) decomposes to give carbon monoxide CO and Cl2. In a typical experiment, 0.631 g of COCl2 is injected into a flask of volume 472 cc. When equilibrium is established, it is found that the total pressure is 2.175 atm. Calculate K for the reaction. The temperature is 1000K. Please explain the steps.

Explanation / Answer

find inital pressure; PV = nRT; P *0.472 = 0.631/99*0.0821*1000 P = 1.1086 atm; (COCl2) -----------------> co + cl2; 1.1086-x x x ; total p =1.1086-x+x+x = 2.175 (given); so x= 1.0663; K = [co][cl2]/[cocl2]; K = 1.0663*1.0663/(1.1086-1.0663) K = 26.8817 ---------------->ANSWER

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