The degree of dissociation of PCl5 is 70% at 250°c. What is its vapour density?

PCl5⇌PCl3+Cl2MNPCl5Mexp⁡PCl5=1+α=1+0.70=1.70∴Mexp⁡PCl5=208.51.70=122.6∴V.D.of PCl5=61.3

The degree of dissociation of PCl5 is 70% at 250°c. What is its vapour density?

PCl5⇌PCl3+Cl2MNPCl5Mexp⁡PCl5=1+α=1+0.70=1.70∴Mexp⁡PCl5=208.51.70=122.6∴V.D.of PCl5=61.3

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The degree of dissociation of PCl₅ is 70% at 250°c. What is its vapour density?

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61 .30

80. 15

70.25

50.34

answer is A.

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$\begin{array}{l} {PCl}_{5} ⇌ {PCl}_{3} + {Cl}_{2} \\ \frac{M_{N} {PCl}_{5}}{M_{\exp {PCl}_{5}}} = 1 + α = 1 + 0 .70 = 1 .70 \\ ∴ M_{\exp {PCl}_{5}} = \frac{208 .5}{1 .70} = 122 .6 \\ ∴ V . D . of {PCl}_{5} = 61 .3 \end{array}$

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The degree of dissociation of PCl₅ is 70% at 250°c. What is its vapour density?