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For one mole of a van der Waals gas when b = 0 and T = 300 K, the PV vs. 1 V plot is shown below. The value of the van der Waals constant a atm . litr e 2 mo l - 2 is

Options

  1. A1.5
  2. B2.5
  3. C1.75
  4. D1.0

Correct answer

A. 1.5

Step-by-step solution

PV = ZRT and Z = 1 - a Z R T P V = 1 - a V R T R T PV = RT - a V Slope of graph between PV and 1 V is -a a = 21.6 - 20.1 3 - 2 = 1.5

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