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+
+//To Calculate the Internal Energy of 1 gram of oxygen at STP.
+
+//Example 27.5
+
+clc;
+
+clear;
+
+m=1;//Mass of Oxygen taken in grams
+
+M=32;//Molecular Weight of Oxygen in g/mol
+
+n=m/M;//Number of moles of Oxygen
+
+R=8.31;//Universal Gas Constant in J/mol-K
+
+T=273;//Temperature in Kelvin at STP
+
+U=int(n*((5/2)*R*T));//Internal Energy of Oxygen
+
+printf("Internal Energy of Oxygen=%d J",U);