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Calculate critical temperature and criti...

Calculate critical temperature and critical pressure of oxygen if the values of the van der Waal's constants `a` and `b` are `1.32 dm^(6) "bar" mol^(-2)` and `0.0312 dm^(3) mol^(-1)` respectively.

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`a = 1.32 dm^(6) "bar" mol^(-2)`
`b = 0.0312 dm^(3) mol^(-1)`
`R = 0.0821 dm^(3) "bar" mol^(-1) K^(-1)`
Critical temperature of oxygen, `T_(c) = (8a)/(27 Rb) = (8 xx 1.32)/(27 xx (0.0312) xx 0.0821 )= 152.82 "K"`
Critical pressure of oxygen, `p_(c)=a/(27b^2)=1.32/(27 xx (0.0312 )^(2)) = 50.38 "bar"`
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