Question: Nitrogen gas adsorbed on a surface to the extent of 1.242 cm:' g-I at 350 kPa and 180 K, but at 240 K the same

Nitrogen gas adsorbed on a surface to the extent of 1.242 cm:' g-I at 350 kPa and 180 K, but at 240 K the same amount of adsorption was achieved only when the pressure was increased to 1.02 MPa. What is the enthalpy of adsorption of nitrogen on the surface?

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