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The essential conditions for liquefactio...

The essential conditions for liquefaction of gases were discovered by Andrews in 1869 as a result of his study of pressure-volume-temperature relationship for `CO_(2)`. If was found that above a certain temperature, it was impossible to liquefy a gas whatever the pressure was applied. The temperature below which the gas can be liquefied by the application of pressure alone is called critical temperature `(T_(c))`. The pressure required to liquefy a gas at this temperature is called the critical pressure `(P_(c))`. The volume occupied by one mole of the substance at the critical temperature and pressure is called critcal volume. Critical constants are related with van der Waals' constant as follows:
`V_(c) = 3b, P_(c) = (a)/(27b^(2)), T_(c) = (8a)/(27 Rb)`
Which of the following parameters is three times the van der Waals' constant 'b' ?

A

Critical volume

B

Critical temperature

C

Vapour density

D

Critical pressure

Text Solution

Verified by Experts

The correct Answer is:
A
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