83. Solving a chemistry problem

83. Solving a chemistry problem

4. Based on the dependence of saturated vapor pressure on temperature and density of a given substance A with molecular weight M in solid and liquid states (RTW and RW in kg/m3) at the triple point: 1) plot lgP versus 1/T; 2) determine the coordinates of the triple point from the graph; 3) calculate the average heat of evaporation and sublimation; 4) build a graph of saturated vapor pressure versus temperature; 5) determine the heat of fusion of the substance at the triple point temperature; 6) calculate dP/dT for the melting process at the triple point temperature; 7) calculate the melting point of the substance at pressure Р Pa; 8) calculate the change in entropy, Gibbs and Helmholtz energy, enthalpy and internal energy for the process of sublimation of 1 mol of substance at the triple point; 9) determine the number of thermodynamic degrees of freedom at the following values ​​of temperature and pressure:

No. var 4

Solid state
T, K 100 104 107 109 110.5 112
R, Pa 4132 8531 14663 19995 25367 29653

liquid state
T, K 105 112 114 115 116 117
R, Pa 17329 29653 34738 38657 46435 53053

Conditions M=30 R=900*105 Pa
dtv=1272kg/m3
j=1260 kg/m3

Additional information:

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