Find the critical constant `( P_(c ) , V_(c ) ` and `T_(c )`) in terms of A and B, also find compressibility factor ( z) for the following equation of state.
`PV = RT-( A)/( V ) + ( 2B) /( V^(2))`
where `&&` and B are constant, P =pressure and V=molar volume.

Answer

`V_(C ) - (6B)/( A), T_(C ) = (A^(2))/( 6RB) , P_(C ) = ( A^(3))/( 108 B ^(2)), ` compressibility factor `= (P_(C ) V_(C ))/( RT_(C ) ) =(1)/(3)`