Question

write the mathematical expression of Tc , Pc & Vc​

Answer 1

Explanation:

T

c

= Temperature at and above which the vapour state can not be further liquified.

P

c

= Pressure of gas in its critical state

V

c

= Volume of gas in its critical state.

relation with the van der waals constants -

T

c

=8a/27Rb So a=27T

c

Rb/8

V

c

=3b So b=V

c

/3

P

c

=a/27b

2

....(1)

put the value of a and b in equation (1)

P

c

=

8×27×b

2

27T

c

×R×b

P

c

=

8×27×b

27T

c

.R

=

8×27×V

c

/3

27T

c

.R

P

c

V

c

=

8

3

RT

c

Answered By

toppr

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Answer 2

$Δnsɯer❤️࿐$

Tc = temperature at and above which the vapour state can not be further liquified.

Pc = pressure of gas in its critical state.

Vc = volume of gas in critical state.