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+////Chapter No 14 Air Standard Cycles
+////Example No 14.6 Page No 308
+///Find standard efficiency
+//Input data
+clc;
+clear;
+T1=27+273;                      //Initial temp in degree celsius                        
+T2=450+273;                     //Final temp in degree celsius      
+gamma1=1.4;
+
+//Calculation
+r=(T2/T1)^(1/(gamma1-1));       //Isentropic process 
+eta=100*(1-(1/(r^(gamma1-1)))); //Otto cycle air standard effeciency in %
+
+//Output
+printf('compression ratio= %f \n ',r);
+printf('standard efficiency= %f percent \n',eta);