1. The following data refer to the adsorption of butane at O'C onto tungsten powder (area 16.7 m go'). Determine whether the data can be fitted with the Langmuir isotherm. If yes, then calculate the number of moles adsorbed in a monolayer, and hence the molecular area for the adsorbed butane (at monolayer coverage); and compare it with the value of 32 x10-20 m estimated from the density of liquid butane. Relative pressure p/pe 0.06 0.12 0.17 0.23 0.30 0.37 Volume adsorbed (at s.t.p.) V(ads)/ 1.10 1.34 1.48 1.66 1.85 2.05 cm q-1