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Question

The degree of dissociation is 0.5 at 800K and 2 atm for the gaseous reaction
PCl5PCl3+Cl2
Assuming ideal behaviour of all the gases. Calculate the density of equilibrium mixture at 800 K and 2 atm.

A
4.232g/L
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B
6.4g/L
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C
8.4g/L
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D
2.2g/L
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Solution

The correct option is C 4.232g/L
NormalwtofPCl5Expt.wtofPCl5=1+2=1.5
208.5expt.wt=1.5
Expt.wt=208.51.5=139
Pu=wmRT
d=wv=PMRT=2×1390.082×800=4.24g/L
d=4.24g/L.

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