A piston-cylinder device contains helium gas

Assignment Help Mechanical Engineering

Reference no: EM13707403

A piston-cylinder device contains helium gas initially at 145 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.

Reference no: EM13707403

Questions Cloud

Determine the final pressure of the gas : Helium gas is contained in a rigid vessel of 0.5 m3 at 500 kPa. The gas is agitated violently by a stirrer that transfers 250 kJ of work to the gas. Assuming that the system undergoes an adiabatic process, determine the final pressure of the gas. Ass..

What is the pressure inside the tire : The pressure in a tire depends on the temperature of the air in the tire. The gage pressure of an automobile tire with a volume of 0.025 m3 is measured to be 210 kPa at 25 oC at sea level on a day with calm weather. If the temperature of the air in t..

Determine heat transferred to and work produced by steam : Steam at 75 kPa and 13 percent quality is contained in a spring-loaded piston-cylinder device, as shown in the figure, with an initial volume of 5.28 m^3. Steam is now heated until its volume is 13.20 m^3 and its pressure is 300 kPa.

At what equivalence ratio for octane-air mixtures : At what equivalence ratio for octane-air mixtures does the carbon to oxygen ratio of the system equal one? Why is this of interest?

A piston-cylinder device contains helium gas : A piston-cylinder device contains helium gas initially at 145 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.

Ice forms on a duct transporting liquid nitrogen : Ice forms on a duct transporting liquid nitrogen. The duct consists of a circular hole, with diameter D=0.5 m, surrounded by square insulation, width=0.95 m, and thermal conductivity k=0.223 W/m*K. The inside of the duct is maintained at the boiling ..

Elevator starting from rest accelerates : If an elevator starting from rest accelerates at 10m/s and then decelerates at -1m/s until it reaches the top floor (ignore gravitational acceleration, assume g=0. Plot the corresponding a-t, v-t and s-t graphs.

Determine the initial volume of the cylinder : A mass of 0.5 g of air is contained in a piston-cylinder device. Initially the system is at 100 kPa and 25°C. The system is now compressed adiabatically to a volume 17 times smaller and a temperature of 700 K.

Helium gas is contained in a rigid vessel : Helium gas is contained in a rigid vessel of 0.5 m3 at 500 kPa. The gas is agitated violently by a stirrer that transfers 250 kJ of work to the gas. Assuming that the system undergoes an adiabatic process, determine the final pressure of the gas. Ass..

User Account

All Pages