initial commit / add all books

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diff --git a/1073/CH6/EX6.9/6_9.sce b/1073/CH6/EX6.9/6_9.sce
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+clc;

+clear;

+//Example 6.9

+Tf=298      //Feed temperature in [K]

+T_dash=373      //[K]

+Cpf=4       //[kJ/kg.K]

+fc=0.2      //Final concentration of salt

+ic=0.05     //Initial concentration

+mf_dot=20000    //[kg/h] Feed to evaporator

+mdash_dot=ic*mf_dot/fc      //Thick liquor [kg/h]

+mv_dot=mf_dot-mdash_dot     //Water evaporated in [kg/h]

+lambda_s=2185       //[kJ/kg]

+lambda=2257       //[kJ/kg]

+bpr=7       //Boiling point rise[K]

+T=T_dash+bpr     //Boiling point of solution in[K]

+Ts=39       //Temperature of condensing steam in [K]

+ms_dot=(mf_dot*Cpf*(T-Tf)+mv_dot*lambda)/lambda_s   //Steam consumption in [kg/h]

+eco=mv_dot/ms_dot           //Economy of evaporator 

+Q=ms_dot*lambda_s               //[kJ/h]

+Q=Q*1000/3600           //[J/s]

+printf("\nHeat load is %d W or J/s",round(Q));

+printf("\n\nEconomy of evaporator is %f ",eco);

+

+printf("\n\nNOTE:Again there is a calcualtion mistake in book at line 19 of code,it is written as 4041507.1 instead of 40415071 \n\n");