initial commit / add all books

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diff --git a/2873/CH6/EX6.4/Ex6_4.sce b/2873/CH6/EX6.4/Ex6_4.sce
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+// Display mode

+mode(0);

+// Display warning for floating point exception

+ieee(1);

+clear;

+clc;

+

+disp("Engineering Thermodynamics by Onkar Singh Chapter 6 Example 4")

+m=5;//mass of steam in kg

+p=2;//pressure of steam in Mpa

+T_superheat=(300+273.15);//temperature of superheat steam in K

+Cp_water=4.18;//specific heat of water at constant pressure in KJ/kg K

+Cp_superheat=2.1;//specific heat of superheat steam at constant pressure in KJ/kg K

+disp("steam state 2 Mpa and 300 degree celcius lies in superheated region as saturation temperature at 2 Mpa is 212.42 degree celcius and hfg=1890.7 KJ/kg")

+T_sat=(212.42+273.15);//saturation temperature at 2 Mpa in K

+hfg_2Mpa=1890.7;

+disp("entropy of unit mass of superheated steam with reference to absolute zero(S)in KJ/kg K")

+disp("S=Cp_water*log(T_sat/273.15)+(hfg_2Mpa/T_sat)+(Cp_superheat*log(T_superheat/T_sat))")

+S=Cp_water*log(T_sat/273.15)+(hfg_2Mpa/T_sat)+(Cp_superheat*log(T_superheat/T_sat))

+disp("entropy of 5 kg of steam(S)in KJ/K")

+disp("S=m*S")

+S=m*S