Question

A compound exists in the gaseous phase both as monomer (A) and dimer (A2). The molecular weight of A is 48 . In an experiment 96g of the compound was confined in a vessel of volume 33.6 litre and heated to 273∘C. Calculate the pressure developed if the compound exists as dimer to the extent of 50% by weight under these conditions.

Answer 1

since A and A₂ are two states in gaseous phase having their weight ratio50% i.e 1:1

∴MoleofA=962×148=1

We have n =wm

∴MoleofA₂=962×196=12

∴Total mole of A and A₂ are=1+12=32

We know that PV = nRT

P×33.6=32×0.0821×546

P = 2 atm

Answer 2

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