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+//example 3.2
+
+clear;
+clc;
+
+//given:
+R=8.314;//universal gas constant [J/K/mol]
+T=300;//temperture for the process [K]
+U=0;//change in internal energy [J]
+V1=2.28;//initial volume [m3]
+V2=4.56;//final volume[m3]
+
+
+//to find the heat lost or gained by the system:
+W=2.303*R*T*log10(V2/V1);//work done during the process[J]
+Q=W;//heat lost or gained by the system[J]
+printf("the heat gained by the system is %f J",Q); \ No newline at end of file