A sample of nickel metal at 350oC adsorbs nitrogen gas (b.p. 3500C). Data was ob

Question

A sample of nickel metal at 350oC adsorbs nitrogen gas (b.p. 3500C). Data was obtained measuring the volumes adsorbed for each gram of nickel versus the nitrogen pressure. Data is summarized below. p/torr 56 95 145 183 223 287 442 533 609 v/cm3/g 0.798 0.871 0.978 1.06 1.16 1.33 1.71 2.08 2.48 (i) With the appropriate graph(s) determine whether the Langmuir or the BET isotherm is more appropriate. (ii) Use the isotherm determined in I1) to find the volume needed to form a monlayer and find the other constant in the isotherm equation. (iii) Calculate the surface area of 1.00 g of nickel metal if the nitrogen molecule occupies an area of 2.56 x 10-14 cm2 .

Explanation / Answer

The graph will be like this

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