Nitrogen gas adsorbed on charcoal to the extent of 0.921 cm3 g−1 at 490 kPa and 190 K, but at 250 K the same amount of adsorption was achieved only when the pressure was increased to 3.2 MPa. What is the enthalpy of adsorption of nitrogen on charcoal? Hint: See the hint for Exercise E19B.5(a).

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Nitrogen gas adsorbed on charcoal to the extent of 0.921 cm3 g−1 at 490 kPa and 190 K, but at 250 K the same amount of adsorption was achieved only when the pressure was increased to 3.2 MPa. What is the enthalpy of adsorption of nitrogen on charcoal? Hint: See the hint for Exercise E19B.5(a).

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