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Vanderwaal's constant for a gas (g) area...

Vanderwaal's constant for a gas (g) are`a=6.34 atm "lit"^(-2), and b =52.6 ml "mol"^(-1)`. Find the critical temperature and critical pressure of the gas.

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Given:
`a= 6.34 atm "lit"^(-2) , b =52.6 ml "mol"^(-1)`
`b=0.0596 "lit mol"^(-1)`
sol `T_(C)=(8a)/(27Rb)`
`=(8xx6.34)/(27xx00821xx0.0526)=437.997~~765K`
`P_(C)=(a)/(27b^(2))=(6.34)/(27xx(0.0526)^(2))=84.87`
`P_(C)=84.87 atm`.
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