initial commit / add all books

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+//ques4

+//Volume expansivity, Isothermal and Adiabatic compressibility

+clear

+clc

+//known data

+ap=5*10^-5;//K^-1 Volume expansivity

+bt=8.6*10^-12;//m^2/N, Isothermal compressibility

+v=0.000114;//m^3/kg, specific volume

+P2=100*10^6;//pressure at state 2 in kPa

+P1=100;//pressure at state 1 in kPa

+w=-v*bt*(P2^2-P1^2)/2;//work done in J/kg

+//q=T*ds and ds=-v*ap*(P2-P1)

+//so q=-T*v*ap*(P2-P1)

+T=288.2;//Temperature in K

+q=-T*v*ap*(P2-P1);//heat in J/kg

+du=q-w;//change in internal energy in J/kg

+printf('Change in internal energy = %.1f J/kg ',du);

+ 
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