A rigid and closed steel tank with a volume of 86 dm
3 contains a mixture...
A rigid and closed steel tank with a volume of 86 dm
3 contains a mixture of saturated vapor and
liquid at a quality and pressure of 0.9 and 20 bar respectively.
Heat is removed from the system until it reaches 147 ° C.
What is the volume of the saturated liquid phase at the end
state?
A rigid tank contains a saturated liquid-vapour mixture of water
in an equilibrium state. The volume of the tank is 110 m3 and the
temperature of the water in the tank is 115°C. In the tank, 70% of
the mass is liquid and 30% of the mass is vapour. Please calculate
the total mass of water in the tank.
A closed, rigid tank contains a two-phase liquid–vapor mixture
of Refrigerant 22 initially at -20°C with a quality of 47.50%.
Energy transfer by heat into the tank occurs until the refrigerant
is at a final pressure of 6 bar.
a) Determine the final temperature, in °C.
b) If the final state is in the superheated vapor region, at what
temperature, in °C, does the tank contain only saturated vapor?
A closed, rigid tank contains water initially at 250 °F with a
quality of 0.4. The tank is heated until the water reaches 290 °F.
Find the initial and final pressure, in lbf/in2 . Sketch the
process on P-υ and T-υ diagrams (be sure to include the vapor dome,
constant temperature and pressure lines, number your states, and
indicate the process direction with an arrow). Thermodynamic
A rigid tank contains hydrogen and has a volume of 4.1
ft3. It is initially at 87°F and 1,072 psia. Hydrogen
then leaks from the tank until it is 76°F and 158 psia. How much
heat transfer occurred into the tank, in Btu. Answer negative if
heat left the tank.
0.1 kg of air (ideal gas) is contained in a closed, rigid tank
of volume 0.04 m^3 at 500 K. A paddle wheel stirs the air and
transfers energy to the air at a constant rate of 1 kW for 100s.
The temperature of the air increases to 600 K.
(a) What is the final pressure of the air (kPa)
(b)Calculate the heat transfer (kJ) for the process (use a
constant, average specific heat)
0.1 kg of air (ideal gas) is contained in a closed, rigid tank
of volume 0.04 m^3 at 500 K. A paddle wheel stirs the air and
transfers energy to the air at a constant rate of 1 kW for 100s.
The temperature of the air increases to 600 K.
(a) What is the final pressure of the air (kPa)
(b)Calculate the heat transfer (kJ) for the process (use a
constant, average specific heat)
A closed, rigid tank fitted with a paddle wheel contains 2.2 kg
of air, initially at 200oC, 1 bar. During an interval of 20
minutes, the paddle wheel transfers energy to the air at a rate of
1 kW. During this time interval, the air also receives energy by
heat transfer at a rate of 0.5 kW. These are the only energy
transfers. Assume the ideal gas model for the air, and no overall
changes in kinetic or potential energy....
A closed rigid tank contains 2 kg of water at 80 C and
quality of 0.5815. The tank is then heated until it contains
only
saturated vapor. How much heat (in kJ) is added to reach this
condition? Include a drawing and plot the process on a P-V
diagram.
Organize the solution as
Given and drawing:
Assumptions:
First Law Analysis:
Solution:
PV diagram:
A rigid tank with a volume of 20 litres initially contains water
at 0.1 degree of dryness and a pressure of 175 KPA. A steam
disposal Valve is located at the top of the tank. Adding heat and
steam by throwing the final case degree of dryness 0.4 and pressure
150 kPa is desired to be made. How much mass is ejected and what is
the entropy produced. Heat source temperature 1000 K.
A 500 L rigid tank contains a saturated water mixture at 200 C
as shown: the mixture is 40% liquid and 60% vapour by volume (State
1). A valve on top of the tank is opened, and saturated vapor is
slowly withdrawn from the tank. Heat transfer occurs during this
process such that the temperature in the tank remains constant. The
valve is closed when 50 % of the initial mass is withdrawn from the
tank (State 2)
(a) Determine...