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The following are the Vander Waal's parameters for four gases W, X, Y and Z Gas a ( a t m L 2 m o l - 2 ) b ( L m o l - 1 ) W 4.0 0.027 X 8.0 0.030 Y 6.0 0.032 Z 12.0 0.027 Based on given values identify, which one of these gases has the highest critical temperature

Options

  1. AW
  2. BX
  3. CY
  4. DZ

Correct answer

D. Z

Step-by-step solution

Critical temperature is the temperature at and above which gases cannot liquefied, no matter how much pressure is applied. For Z gas of given gases, critical temperature is highest T c   =   8a 27Rb ⇒ T c ∝ a b ⇒ It is highest for Z

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