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Standard XII

Chemistry

Liquefaction of Gases and Critical Constants

If for gas cr...

Question

If for gas critical parameters are $P_{c} = 2 a t m, T_{c} = 47^{o} C$ , then approximate value of $V_{c}$ will be:

10 L

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5 L

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20 L

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2 L

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Solution

The correct option is A $5 L$
A temperature above which a gas cannot be liquifies is called critical temperature. Denoted as Tc , where Pc is critical pressure and Vc molar critical volume.
Now ,
$R = 0.082 L a t m K^{- 1} m o l^{- 1}$
$V c = 3 b$ ( according to ideal gas equation )

and $b = \frac{R T c}{8 P c} = 0.1 L m o l^{- 1}$ or $V c = 0.3 m o l^{- 1}$

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If for gas critical parameters are Pc=2atm,Tc=47oC, then approximate value of Vc will be:

The correct option is A 5LA temperature above which a gas cannot be liquifies is called critical temperature. Denoted as Tc , where Pc is critical pressure and Vc molar critical volume.Now , R=0.082LatmK−1mol−1Vc=3b ( according to ideal gas equation ) and b=RTc8Pc=0.1Lmol−1 or Vc=0.3mol−1

If for gas critical parameters are $P_{c} = 2 a t m, T_{c} = 47^{o} C$ , then approximate value of $V_{c}$ will be: