The Critical Constants

(b) The critical constants of
P
0

,T
c

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and
V
mo

of ethane,
C
2

H
0

, were given as
48.2 atm The Critical Constants
,
305.4 K
2

and
148 cm
3
mol
−1

, respectively. Determine the pressure exerted by
74.6 g
of ethane confined in a
200−cm
3

container at
37.5

C
using (i) the ideal gas law. (ii) the reduced van der Waals equation. ( 8 marks)The Critical Constants

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