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+//Chemical Engineering Thermodynamics
+//Chapter 3
+//First Law of Thermodynamics
+
+//Example 3.3
+clear;
+clc;
+
+//Given
+P = 1;//constant pressure throughout the process in atm
+T1 = 273;//Initial temperature in K
+T2 = 373;//Final temperature in K
+V1 = 0;//Volume of liquid water or initial volume
+V0 = 22.4;//volume of vapour at standard condition in cubic meter
+Q = 9.7//Heat of vapourisation in Kcal
+
+//To calculate the work done by the expanding gas and increase in internal energy
+//(i)Calculation of work done
+V2 = 22.4*(T2/T1)*(P)*(10^-3);//Volume of final vapour in cubic meter
+w = P*(V2-V1);//Work done in atm cubic meter
+W = w*(1.03*10^4)/427;//Work done in Kcal
+mprintf('(i)Work done by the expanding gas is %f Kcal',W);
+
+//(ii)Calculation of change in internal energy
+delE = Q-W;
+mprintf('\n\n (ii)Increase in internal energy is %f Kcal',delE);
+//end
+\ No newline at end of file