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A vessel of volume , V = 5.0 litre conta...

A vessel of volume , `V = 5.0` litre contains `1.4 g` of nitrogen at a temperature `T = 1800 K`. Find the pressure of the gas if `30%` of its molecules are dissociated into atoms at this temperature.

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After dissociation each `N_2` molecule becomes two `N-`atoms and so contributes, `2 xx 3` degrees of freedom. Thus the number of moles becomes
`(m)/(M) (1 + eta)` and `p = (mRT)/(MV) (1 + eta)`
Here `M` is the molecular weight in grams of `N_2`.
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