At 273 K and 1atm, 10 liter of N 2  O4 decomposes to NO2, according to equation N2O4(g)⇌2NO2(g) what is degree of dissociation (alpha) when the original volume is 25% less than that of existing volume?

For ideal gas,   mole %≡ volume %           N2O4(g)⇌2NO2(g) Initial     a              0 at eq.  a(1-α)      2aα As per given original volme =75100× Volume at eq.   at constant T and P: V∝n ∴a=0.75×a(1+α)⇒α=0.33