A gas contained in a vertical cylindrical tank has a volume of [10 + (K/100)] m3 . The gas receives a paddle work of 7.5 W for 1 hours. If the density of the gas at the initial state is 1.5 kg/m3 , determine the specific heat gain or loss if the specific internal energy of the gas increases by [(K/10) + 5] kJ/kg . K=828

In a turbine 1,308 kW is produced by expanding an exhaust gas entering at 2.2 MPa and 662 K to a final pressure of 154 kPa. The inlet area of the turbine is The inlet area of the device is 0.2 m2 and the gas velocity at inlet is 25 m/s and at outlet is 51 m/s. Determine the specific volume at outlet in m3/kg to 2 decimal places.  Assume the gas constant to be 0.26 (kPa m3)/(kg K) and constant specific heats cp=1.01 kJ/(kg K) and cv=0.75 kJ/(kg K).

An elastic sphere with an initial diameter of 80 cm contains a gas at a pressure of 1.2 atm due to heat transfer the diameter of the sphere increases by 1.1 m. During the process the pressure of the gas inside the Sphere is proportional to the diameter of the Sphere. Determine the work done by the gas in kilojoules.

A gas is contained in a vertical piston-cylinder assembly by a piston with a face area of 60 in2 and weight of 100 lbf. The atmosphere exerts a pressure of 14.7 lbf/in² on top of the piston. A paddle wheel transfers 3 Btu of energy to the gas during a process in which the elevation of the piston increases slowly by 2 ft. The piston and cylinder are poor thermal conductors, and friction between the piston and cylinder can be neglected. Determine the work done by the gas on the piston, in Btu, and the change in internal energy of the gas, in Btu. Step 1 Determine the expansion work done by the gas on the piston, in Btu. Wexp = i Btu