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+clear;

+clc;

+printf("\t\t\tProblem Number 6.25\n\n\n");

+// Chapter 6: The Ideal Gas

+// Problem 6.25 (page no. 268) 

+// Solution

+

+//data given

+T2=500+273; //Celsius temperature converted to Kelvin //final temperature

+T1=20+273; //Celsius temperature converted to Kelvin //initial temperature

+cp=1.0062; //specific heat at constant pressure //kJ/kg*K

+//From the energy equation for the constant-pressure process,the heat transferred is deltah.Therefore,

+//q=deltah=cp*(T2-T1)

+deltah=cp*(T2-T1); //heat transferred //kJ/kg //into system

+printf("The heat transferred is per kilogram of air %f kJ/kg\n",deltah);

+deltas=cp*log(T2/T1); //increase in entropy //kJ/kg*K

+printf("The increase in entropy per kilogram of air is %f kJ/kg*K\n",deltas);