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The vapour density of PCl(5) at 43K is i...

The vapour density of `PCl_(5)` at `43K` is is found to be `70.2`. Find the degree of dissociation of `PCl_(5)` at this temperature.

Text Solution

Verified by Experts

Theoretical vapour density of `PCl_(5)` ,
`D=(" Mol.mass of " PCl_(5))/2 = (31 + 5 xx 35*5)/2 = (208*5)/2 = 104 * 25`
Observed vapour density , d= `70*2 `
`:. "Degree of dissociation " (alpha)=(104*25 - 70*2)/(70*2)=0*485`
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