44. Solving a chemistry problem

4. The volume V of the substance (referred to 273 K and 1.01 * 105 Pa) adsorbed 1 g of the adsorbent at 273 K and various pressures is given in the table:
1) plot the adsorption isotherm V=f(p) and p/V=f(p);
2) describe the adsorption isotherm using the Langmuir equation;
3) determine the adsorption (m3/g) at the maximum filling of the adsorbent;
4) determine the degree of filling of the adsorbent at pressure P1;
5) determine at what gas pressure the degree of filling of the adsorbent will be 0.4.
T,K Adsorbent Adsorbate P1*10-4, Pa P*10-3, Pa V*106, m3/g
273 coal H2 2.0 27.60 43.30 57.40 72.20 86.10 0.447 0.698 0.915 1.142 1.352