At some temperature and under a pressure of 4 atm, PCl5 is 10% dissociated. Calculate the pressure at which PCl5 will be 20% dissociated, temperature remaining same.
19.2 atm
0.192 atm
0.096 atm
0.96 atm
A
19.2 atm
B
0.192 atm
C
0.096 atm
D
0.96 atm
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Solution
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At 4 atm pressure and 10% dissociation.
PCl5→
PCl3
Cl2
Equibm mole
90
10
10
Equilibrium partial pressures
90110×4
10110×4
10110×4
Hence, Kp=PPCl3PCl2PPCl5=499.
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