A 0.2 m3 rigid tank contains 5 kg of water (in any phase or
phases) at...
A 0.2 m3 rigid tank contains 5 kg of water (in any phase or
phases) at 600 kPa. Which of the following values is closest to the
temperature of the water in the tank?
Water is contained in a closed, rigid, 0.2 m3 tank at
an initial pressure of 5 bar and a quality of 50%. Heat transfer
occurs until the tank contains only saturated vapor. Determine
a)the final mass of vapor in the tank, in kg,b)
the final pressure, in bar.
An insulated rigid tank having a 0.2 m3 volume initially
contains air at 400 kPa and 313 K. The amount of paddle-wheel work
done on the system is 200 kJ. Calculate the nearest value of
entropy change
a. 0.66 kJ/K
b. 0.88 kJ/K
c. None
d. 0.44 kJ/K
e. 0.33 kJ/K
A rigid tank of volume 0.3 m3 contains water
initially at its critical point. The water is now cooled to
150°C
a) What mass of water is in the tank?
b) Has the average specific volume of this water changed during
the cooling process?
c) Find the mass of liquid water and the mass of water vapor in
the tankat the end of the process.
d) Find the volume of liquid water and the volume of water vapor
in the...
A closed, rigid, 0.40 m3 tank is filled with 15 kg of
water. The initial pressure is p1 = 20 bar. The
water is cooled until the pressure is p2= 4
bar.
Determine the initial quality, x1, and the heat
transfer, in kJ.
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, well-insulated tank contains a two-phase mixture
consisting of 0.005 ft3 of saturated liquid water and 2.7 ft3 of
saturated water vapor, initially at 14.7 lbf/in.2 A paddle wheel
stirs the mixture until only saturated vapor remains in the tank.
Kinetic and potential energy effects are negligible. For the water,
determine the amount of energy transfer by work, in Btu.
1. A large open tank contains fresh water of constant density (p
= 1000 kg/m3).
a) Construct an algebraic expression for the absolute pressure
(P) at a specific depth below the surface of the water (y) in terms
of gravitational acceleration (g), the depth of water (y), and the
density of water (ρ).
A well-insulated tank of 50 m3 volume initially
contains 16,000 kg of water distributed between liquid and vapor
phases at 25°C. Saturated steam at 1500 kPa is admitted to the tank
until the pressure reaches 800 kPa. What mass of steam is added
(kg)?
A 5 m3 tank contains superheated steam at 300°C and
22500 mmHg. The tank (and the steam inside) is cooled until the
pressure inside is reduced to 2 bar. At this point, liquid water
and saturated steam coexist together in the tank. How much heat was
removed from the tank, what is the final temperature, and how many
kilograms of steam condensed in the process?
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.