7 Air that initially occupies 0.14 m3 at a gauge pressure of 103.0 kPa is expanded...
air that initially occupies 0.140 m^3 at a gauge pressure of 103.0 kPa is expanded isothermally to a pressure of 101.3 kPa and then cooled at constant pressure until it reaches its initial volume. Compute the work done by the air. (Gauge pressure is the difference between the actual pressure and the atmospheric pressure).
Air that initially occupies 0.21 m3 at a gauge pressure of 120 kPa is expanded isothermally to a pressure of 101.3 kPa and then cooled at constant pressure until it reaches its initial volume. Compute the work done by the air. (Gauge pressure is the difference between the actual pressure and atmospheric pressure.)
Air that initially occupies 0.144 m3 at a gauge pressure of 211.0 kPa is expanded isothermally to a pressure of 101.3 kPa and then cooled at constant pressure until it reaches its initial volume. Compute the work done by the air. (Gauge pressure is the difference between the actual pressure and atmospheric pressure.)
Air that initially occupies 0.90 m^3 at a gauge pressure of 110 kPa is expanded isothermally to a pressure of 101.3 kPa and then cooled at constant pressure until it reaches its initial volume. Compute the work done by the air. (Gauge pressure is the difference between the actual pressure and atmospheric pressure.)
A system contains 0.2 m3 of air at a pressure of 400 kPa and 200°C. It is expanded polytropically (n=1.2) till the pressure falls to 150 kPa. The air is then heated at constant pressure till its enthalpy increases by 80 kJ. Determine: i. the final volume ii. the total work done
An automobile tire is filled to a gauge pressure of 185 kPa when its temperature is 20°C. (Gauge pressure is the difference between the actual pressure and atmospheric pressure.) After the car has been driven at high speeds, the tire temperature increases to 57°C. Please help with both parts of this problem. Thanks! An automobile tire is filled to a gauge pressure of 185 kPa when its temperature is 20°C. (Gauge pressure is the difference between the actual pressure and...
Problem 7-173- A piston–cylinder device contains air that undergoes a reversible thermodynamic cycle. Initially, air is at 400 kPa and 300 K with a volume of 0.3 m3. Air is first expanded isothermally to 150 kPa, then compressed adiabatically to the initial pressure, and finally compressed at the constant pressure to the initial state. Accounting for the variation of specific heats with temperature, determine the work and heat transfer for each process.
A piston-cylinder device contains 1.15 kg of air initially at 2441 kPa and 379 oC. The air is first expanded isothermally to 470 kPa, then compressed polytropically with a polytropic exponent of 1.7 to the initial pressure, and finally compressed at the constant pressure to the initial state. Determine the net work of the cycle Net work kJ A pistoo-cylinder deuice contains 0.45 kg ofair ity at 2°us kPa and 318 c. The air is first expanded iiethermally to 465kfe,...
An ideal gas with γ=1.4 occupies 5.0 L at 300 K and 100 kPa pressure and is heated at constant volume until its pressure has doubled. It's then compressed adiabatically until its volume is one-fourth its original value, then cooled at constant volume to 300 K , and finally allowed to expand isothermally to its original state. Find the net work done on the gas in Joules.
1) An automobile tire is filled to a gauge pressure of 196 kPa when its temperature is 20°C. (Gauge pressure is the difference between the actual pressure and atmospheric pressure.) After the car has been driven at high speeds, the tire temperature increases to 51°C. (a) Assuming that the volume of the tire does not change, and that air behaves as an ideal gas, find the gauge pressure of the air in the tire. (b) Calculate the gauge pressure if...