20% surface sites have adsorbed . On heating gas evolved from sites and were collected at 0.001 atm and 298 K in a container of volume is 2.46 . Density of surface sites is and surface area is 1000

Question

20% surface sites have adsorbed . On heating  gas evolved from sites and were collected at 0.001 atm and 298 K in a container of volume is 2.46 . Density of surface sites is  and surface area is 1000 , find out the number of surface sites occupied per molecule of .

Canvas Classes · Accepted Answer

Each  molecule may sit on more than one surface site. Find the molecules released (from gas data) and the sites actually occupied ( of all sites), then divide.

Gas molecules released:  (with  for  in )

Molecules

Sites occupied: total sites

Occupied ()

Sites per molecule

Watch out: use  when volume is in  (not , which is for litres). And take  of the sites before dividing — only the occupied sites count.

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