93. Solving a chemistry problem

93. Solving a chemistry problem

According to the dependence of saturated vapor pressure on the temperature and density of a given substance A (dsolid and dl in kg / m3) at the triple point (tr.t.):
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) plot the dependence of saturated steam pressure on temperature;
5) determine the heat of fusion of a substance at the triple point temperature;
6) calculate dT/dp for the melting process at the triple point temperature;
7) calculate the melting point of the substance at pressure p, 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:
a) Ttr.t , ptr.t;
b) Tntc, p= 1.013 x 105 Pa;
c) Tntk, ptr.t

Option 8
State
Solid state
T, K 276.6 278.2 279.2 280.2 281.4
R, Pa 1413 1706 1879 2066 2372
liquid state
T, K 277.2 279.2 281.4 283.2 285.2 288.7
R, Pa 1826 2082 2372 2626 2932 3279
Terms
M=46
Р=950*105 Pa
dtv=1240
j=1290

Additional information:

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