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+//Part A Chapter 7 Example 8

+clc;

+clear;

+close;

+P1=1;//MPa

+V1=0.05;//m^3

+x1=80/100;//dryness fraction

+P2=1;//MPa

+V2=0.2;//m^3

+W=P1*1000*(V2-V1);//kJ

+vf=0.001127;//m^3/kg//at 1 MPa

+vg=0.19444;//m^3/kg//at 1 MPa

+uf=761.68;//kJ/kg//at 1 MPa

+ufg=1822;//kJ/kg//at 1 MPa

+vfg=vg-vf;//m^3/kg

+v1=vf+x1*vfg;//m^3/kg

+ms=V1/v1;//kg(mass of steam)

+v2=V2/ms;//m^3/kg

+T1=1000;T2=1100;//degree C(as v2>vg(1MPa))

+T=T1+(T2-T1)*(v2-0.5871)/(0.6355-0.5871);//degree C

+u2=4209.6;//kJ/kg(at 1MPa & T degree C)

+u1=uf+x1*ufg;//kJ/kg

+Q=W+ms*(u2-u1);//kJ

+disp("Heat added is "+string(Q)+" kJ");