Chapter 6, Problem 6.132EP

A piston / cylinder contains 2 kg of air at 27 °C and 200 kPa. The piston is loaded with a linear spring, mass and the atmospheric pressure. Stops are mounted so that Vstop is 3m' at which the pressure is 600 kPa, see figure 2. The air is now heated to 400 kPa. Find the final volume and the work done. 2.

A 4 kW 20L water heater is switched on for 10minutes. The heat capacity of water is 4.187 kJ/kgK. Assuming total electrical energy has gone intoheating the water, find the increase in watertemperature.

THERMODYNAMICS A certain gas expand from 7ft3 to 23ft3 while the pressure remains constant at 17.5psia. Find the work nonflow in the system in BTU.

A rigid insulated tank is separated into two rooms by a stiff plate. Room A of 0.5 m3 contains air at 250 Kpa, 300 K and room B is 1 m3 has air at 200 Kpa, 1000 K. the plate is removed and the air comes to a uniform state without any heat transferred. find the final temp and pressure of the room. An ideal gas is 45 psig and 800F is heated in a closed container to 130 0F. What is the final pressure? An air bubble rises from the bottom of a well where the temperature is 25 0C, to the surface where the temperature is 27 0C. Find the percent increase in the volume of the bubble if the depth of the well is 5m. Atmospheric pressure is 101.528 kPaa. A 3000 cm3 tank initially contains compressed air at 600 kPag and 28 oC. Determine the mass of air to be withdrawn from the tank to reduce its pressure to 80 kPag while the temperature remains unchanged.

one kg of steam expands isentropically from 25mpa and 300 degrees to 0.95mpa.find the final quality and Wn and Ws

A rigid insulated tank is separated into two rooms by a stiff plate. Room A of 0.5 m3 contains air at 250 Kpa, 300 K and room B is 1 m3 has air at 150 Kpa, 1000K. the plate is removed and the air comes to a uniform state without any heat transferred. find the final temp and pressure of the room.

QUI A piston-cylinder device with a set of stops initially contains 300 g of steam at 1000 Kpa and 400 C. Find the work if the final state IMpa and 250 C, and work if the position of the stops corresponds to 60% of the initial volume and also find the temperature at the final state if P-500Kpa Steam 300 g 1000 Kpy 400°C e

A constant-pressure piston/cylinder assembly con- tains 0.2 kg of water as saturated vapor at 400 kPa. It is now cooled so that the water occupies half of the original volume. Find the work and heat trans- fer for the process.

The pressure inside a diesel engine cylinder is 20 kPa, find the work done if the volume changes from 3.5 m3 to 5.0 m3.