If a gas is flowing at 300m/s and has a pressure and temperature
of 90kPa and...
If a gas is flowing at 300m/s and has a pressure and temperature
of 90kPa and
20°C, find the maximum possible velocity that could be generated by
expansion
of this gas if the gas is air and if it is helium
1.00 moles of a gas is at a temperature of 273 Kelvin and has a
pressure of 1.00x105Pa.
What is its initial volume?
STEP 1: Its pressure is doubled while keeping its volume
constant. What is its temperature after this step?
STEP 2: Its temperature is held constant while it it is reduced
back to its initial pressure. What is the the volume after this
step?
Draw a PV diagram showing the two step (it doesn’t have to have
numbers,...
Water flowing along a horizontal pipe has a speed of 2.31 m/s
and a pressure of 4.25 atm. Further along, the pipe narrows so that
the cross-sectional area decreases by a factor of 6.17. What is the
pressure in the narrow section?
Gas is confined in a tank at a pressure of 11.5 atm and a
temperature of 22.0°C. If two-thirds of the gas is withdrawn and
the temperature is raised to 60.0°C, what is the pressure of the
gas remaining in the tank?
Water at a temperature of 80 °C and velocity of 1.2 m/s is
flowing parallel to one side of a smooth flat plate. The plate is
maintained at a constant temperature of 24 °C and is 0.8 m long and
0.5 m wide. Determine the following:
The heat flux at a distance x = 0.6m from the front edge of the
plate, q” = ____________
The location of the maximum heat flux on the plate, x =
_________
The total...
A gas turbine unit has a pressure ratio of 5/1 and a maximum
cycle temperature of 550⁰C. The turbine drives the compressor and
an electric generator., the mechanical efficiency of the drive
being 97%. The ambient temperature is 20⁰C and the isentropic
efficiencies of the compressor and turbine are 0.8 and 0.83
respectively.
Calculate the power output in kilowatts for an airflow of
15kg/s. Calculate also the thermal efficiency and the work ratio.
Neglect changes in kinetic energy, and the...
Air is flowing in a 1.5 m2 wind tunnel at 200 m/s at
a pressure of 250kPa, and temperature of 20°C at the entrance.
Calculate:
(i) Mach number
(ii) Total Temperature
(iii) Total Pressure
(iv) Mass flow rate of air.
part a.) A sample of argon gas at a pressure of 1.05 atm and a
temperature of 21.0 °C, occupies a volume of 11.0 liters. If the
gas is allowed to expand at constant temperature to a volume of
15.6 liters, the pressure of the gas sample will be atm.
part b.) A sample of xenon gas at a pressure of
0.763 atm and a temperature of 29.9
°C, occupies a volume of 12.9 liters. If
the gas is allowed...
1. A sample of nitrogen gas at a pressure of 0.947 atm and a
temperature of 213 °C, occupies a volume of 687 mL. If the gas is
cooled at constant pressure until its volume is 570 mL, the
temperature of the gas sample will be 2. A helium-filled weather
balloon has a volume of 615 L at 23 °C and 754 mm Hg. It is
released and rises to an altitude of 7.93 km, where the pressure is
323...
A sample of helium gas at a pressure of 772 torr and a
temperature of 22.7 °C, occupies a volume of 814 mL. If the gas is
allowed to expand at constant temperature until its pressure is 549
torr, the volume of the gas sample will be mL.
A sample of argon gas at a pressure of
697 torr and a temperature of 26.4
°C, occupies a volume of 448 mL. If the
gas is compressed at constant temperature until...