Q5: In a closed vessel the 100 kg of steam at 100 kPa, 0.5 dry is to be brought to a pressure of 1000 kPa inside vessel. Determine the mass of dry saturated steam admitted at 2000 kPa for raising pressure. Also determine the final quality.

In a certain manufacturing process a certain Liquid gas under 14.7 psia pressure with has a normal boiling point of -183 °C. They decided to be store this in a spherical container with 11.811 inches OD. The system is kept adiabatic by enclosing the container inside another concentric sphere of 0.45 m ID, with intervening space evacuated. Both the sphere surfaces are made of aluminum with e= 0.3. The temperature of the outer sphere is 40°C. To miminized heat gain a polished aluminum with an emissivity of 0.03 was used for container walls. Determine the percentage reduction.choices 81,90% 10.67% 83.12% 39,68% 78.56% 89.75%

a cylinder-plunger contains 2.4x10 ^ -2 kg of air that is subjected to a cycle: Process 1-2: Isochoric process (0.02m ^ 3) from .1MPa to 0.42MPa Process 2-3: isobaric cooling Process 3-1: Isothermal heating Calculate Q and W for each stage

The work done when a gas is expanded in a cylinder is -220 J. A heat transfer of 190 J occurs from the surrounding to the gas. Calculate ∆E of the gas in J.

The wall of a spherical steel tank k, = 17 m. K thick contains hot oil at 100°C. On the outside of the tank 10mm of spray W urethane insulation k, = 0.026 m. K of 1m in diameter and 100 mm h = 16. is added to stop the oil from cooling. If the outside temperature is 25°C, W m².K needs to be added to keep the tank at 100°C for pumping reasons? What are the overall heat transfer coefficients (Uo and Ui)? and h = 5 (₁ m². K how much heat

In a movie theater in winter, 500 people are watching a movie. The heat losses through the walls, windows, and the roof are estimated to be 150,000 Btu/h. Determine if the theater needs to be heated or cooled.  

How much work must be input by the paddle wheel below to raise the piston 5 cm. The initial temperature is 100°F.