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+clear;
+clc;
+printf("\t\t\tProblem Number 6.23\n\n\n");
+// Chapter 6: The Ideal Gas
+// Problem 6.23 (page no. 265)
+// Solution
+
+//data
+deltaS=0.4386; //change in entropy //Unit:kJ/K
+T2=273+425; //Celsius temperature converted to kelvin //initial temperature
+cv=0.8216; //specific heat at constant volume //kJ/kg*K
+m=1.5; //mass //kg
+//Now,
+//deltas=m*cv*log(T2/T1);
+T1=T2/(exp(deltaS/(m*cv))) //initial temperature //unit:K
+printf("The initial temperature of the process is %f K or %f C\n",T1,T1-273)