A halloon containing air has an initial temperature of 300 K. The baloon is heated and...
5. Air expands isothermally constant temperature) in a closed, piston-cylinder device. The original state is given by pı = 20 MPa, T = 1000 K. the process continues until the pressure drops to 2 MPa. The original volume of the air is V1 = 1 m². Determine the following: a. the mass of the air in the system, in kg. b. the final density of the air, in kg/m". Remember, Rair = 0.287 kJ/kg-K c. the final volume of the...
Air at 300 K, 100 kPa in a rigid box is heated to 1000 K by a 1500 K source. a_ Find the final pressure. b_ Find the specific heat transfer. c_ Find the total entropy generation per kg air.
4) Volume 2.5 m^3 air in a rigid tank with initial pressure 100 kPa and temperature 25°C There. It is applied to the tank feed line by a valve. Pressure of air flowing through the supply line 600 kPa and temperature is 25°C. By opening the valve, the pressure of the air in the tank is air entering the tank until it is equal to the pressure of the air It is closed. A thermometer placed in the tank lasts...
A stoichiometric mixture of ethanol (C2H6O), octane (C8H18), and air initially at T1 = 300 K, P1 = 100 kPa, P2 =4500 kPa, and V1 = 5 liters (0.005 m3) is compressed in a piston-cylinder assembly in a polytropic process where n = 1.2 What is the final volume V2 (m3 ), the initial total volume of moles (kmol), and the final Temperature T2? NOTE: Universal gas constant: Ru = 8.314 k]/ kmolK Please show ALL steps and units with...
A frictionless piston-cylinder device contains air at 300 K and 1 bar and is heated until its volume doubles and the temperature reaches 600 K. Answer the following: A. You are interested in studying the air in the piston-cylinder device as a closed system. Draw a schematic of your device and the boundary that defines your system. Assume the cylinder is in horizontal position. B. Determine the final pressure of the air at the end of the process, in bar....
9. One mole of an ideal gas, initially at 300 K, is cooled at constant volume so that the final pressure is one-fourth the initial pressure. Then the Ras expands at constant pressure until reaches the initial temperature. Determine the work done on the gas.
A balloon with an initial volume of 3.5 L at a temperature of 294 K is warmed to 365 K . What is its volume at the final temperature? (Assume constant pressure.) Express your answer using two significant figures.
A flexible balloon contains 0.350 mol of an unknown polyatomic gas. Initially the balloon containing the gas has a volume of 6900 cm3 and a temperature of 30.0 ∘C. The gas first expands isobarically until the volume doubles. Then it expands adiabatically until the temperature returns to its initial value. Assume that the gas may be treated as an ideal gas with Cp=33.26J/mol⋅K and γ=4/3. What is the total heat Q supplied to the gas in the process? What is...
A balloon contains air at 25C and 1 atm pressure and has initial diameter of 0.5m. When it is filled with air isothermally and reversibly the pressure reaches 5 bar. Assume that pressure is proportional to the diameter of the balloon and calculate a) the final diameter of the balloon and b) the work done in the process
A balloon contains air at 25C and 1 atm pressure and has initial diameter of 0.5m. When it is filled with air isothermally and reversibly the pressure reaches 5 bar. Assume that pressure is proportional to the diameter of the balloon and calculate a) the final diameter of the balloon and b) the work done in the process. 4.