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+//scilab 5.4.1

+clear;

+clc;

+printf("\t\t\tProblem Number 5.3\n\n\n");

+// Chapter 5 : Properties Of Liquids And Gases

+// Problem 5.3  (page no. 188) 

+// Solution

+

+//The necessary interpolations are best done in tabular forms as shown:

+//  p    hg

+// 115  1190.4  table 2

+// 118  1190.8  (hg)118=1190.8

+// 120  1191.1

+hg=1190.4+(3/5)*(1191.1-1190.4); //Btu/lbm //enthaply

+printf("The enthalpy of saturated steam at 118 psia is %f Btu/lbm\n",hg);

+

+//  p    vg

+// 115  3.884  table 2

+// 118  3.792  (vg)118=3.790

+// 120  3.730

+vg=3.884-(3/5)*(3.884-3.730); //ft^3/lbm //specific volume

+printf("The specific volume of saturated steam at 118 psia is %f ft^3/lbm\n",vg);

+

+//  p    sg

+// 115  1.5921  table 2

+// 118  1.5900  (sg)118=1.5900

+// 120  1.5886

+sg=1.5921-(3/5)*(1.5921-1.5886); //entropy

+printf("The entropy of saturated steam at 118 psia is %f\n",sg);

+

+//  p    ug

+// 115  1107.7  table 2

+// 118  1108.06  (ug)118=1180.1

+// 120  1108.3

+ug=1107.7-(3/5)*(1108.3-1107.7); //internal energy

+printf("The internal energy of saturated steam at 118 psia is %f\n",ug);

+//The interpolation process that was done in tabular form for this problem can also be demonstated by refering to figure 5.8 for the specific volume.It will be 

+//seen that the results of this problem and the tabulated values are essentially in exact agreement and that linear interpolation is satisfactory in these tables.