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+//Example 2.4
+clear;
+clc;
+
+//Given
+pH=7.4;//pH of the body fluid
+v=3;//volume of gastric juice produced per day in dm^3
+R=8.314;// gas constant in J K^-1 mol^-1
+T=310;// temperature in K
+ph=1;// pH of the gastric juice produced
+
+// To determine minimum work required
+c1=10^((-1)*pH);// hydrogen ion concentration of body fluid in mol dm^-3
+c2=10^((-1)*ph);//hydrogen ion concentration of the gastric juice in mol dm^-3
+n=c2*v;//moles of hydrogen ions in given volume of gastric juice
+w=n*R*T* log(c2/c1);// w in joule
+W=w*0.001;//w in kJ
+mprintf('minimum work required (w) = %f kJ',W);
+//end
+\ No newline at end of file