Question

College of Arts & Sciences Department of Chemistry & Earth Science جامة قطر GE Q2) (15 marks) A When phosphorus pentachloride, PCls, is heated at a constant pressure of exactly 1 bar to a temperature of 1400 K, the amount of phosphorus pentachloride decreases by X% (X: (last three digits of your st. QU ID)*0.02) because of dissociation to phosphorus trichloride, PCls, and chlorine, Clz. (a) Determine the equilibrium constant at this temperature. (b) is the reaction spontaneous at 1400 K? explain. show your work here

last three digits of ID: 523

Answer 1

the con. dissociation of Pels At beging as com here Pol can be given by Pu, Coca o x x given r r. (5a3 xoda) 10.46.1 10.46 - 1 x an is 0.1046 O a com – 0.8954 [Pug) = 1-0.1046 [14) - 0.1046 [c) - 0.1046 produl - Now kp= kc (RT) on her on= (no. of males of word) - (no of mole gach) - 2-11 o - Now &p= [p]ruz). (6.0831) (1400)' (PU) kp= 0.1046 x 0.1046 (0.0831) (140) 0.8954 0.01222 X 116.36 = 1.42

3. kp 1. 12 bar Since kep 1670 x n react, is er 5. Spontoneow at 1400k leer.o dolorl lui Duolo dalis