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+//(6.10)  A rigid, well-insulated tank is filled initially with 5 kg of air at a pressure of 5 bar and a temperature of 500 K. A leak develops, and air slowly escapes until the pressure of the air remaining in the tank is 1 bar. Employing the ideal gas model, determine the amount of mass remaining in the tank and its temperature.
+
+
+//solution
+
+//variable initialization
+m1 = 5                                           //initial mass in kg
+P1 = 5                                           //initial pressure in bar
+T1 = 500                                         //initial temperature in kelvin
+P2 = 1                                           //final pressure in bar
+
+//from table A-22
+pr1 = 8.411
+
+pr2 = (P2/P1)*pr1
+
+//using this value of pr2 and interpolation in table A-22
+T2 = 317                                         //in kelvin
+
+m2 = (P2/P1)*(T1/T2)*m1
+printf('the amount of mass remaining in the tank in kg is :\n \t m2 = %f',m2)
+printf('\n and its temperature in kelvin  is : \n\t T = %f',T2)
+\ No newline at end of file