For a van der Waals gas a = 4.5 atm L^2 mol^{-2} , b = 0.9 L mol^{-1} (v_c = 3b; P_c = a/{27b^2} ; T_c = \frac{8a}{27bR} ; R = 0.0821 L atm K^{-1} mol^{-1}) Its critical constants T_c,P_c and V_c respectively are approximately

Correct Answer is : 18. 0.2, 2.7

TS EAMCET Medical 8 May 2019 Shift 1 Paper

Question : 128 of 161

Marks: +1, -0

For a van der Waals gas
a = 4.5 atm L2mol−2 , b = 0.9 L mol−1
(vc = 3b; Pc =

27b2

; Tc =

27bR

; R = 0.0821 L atm K−1mol−1)
Its critical constants Tc,Pc and Vc respectively are approximately

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