Question
In: Mechanical Engineering
A mass of 0.3 kg of saturated refrigerant-134a is contained in a piston-cylinder device at 240...
A mass of 0.3 kg of saturated refrigerant-134a is
contained in a piston-cylinder device at 240 kPa.
Initially, 70 percent of the mass is in the liquid phase. Now heat
is transferred to the refrigerant at
constant pressure until the cylinder contains vapor only.
(a) show the process on a P-v and T-v diagrams with respect to
saturation lines. Determine;
(b) the volume occupied by the refrigerant initially,
(c) the work done, and
(d) the total heat transfer.
Solutions
samet mamat answered 4 months agoRelated Solutions
A mass of 0.3 kg of saturated refrigerant-134a is contained in a piston-cylinder device at 240...
A mass of 0.3 kg of saturated refrigerant-134a is
contained in a piston-cylinder device at 240 kPa.
Initially, 70 percent of the mass is in the liquid phase. Now heat
is transferred to the refrigerant at
constant pressure until the cylinder contains vapor only.
(a) show the process on a P-v and T-v diagrams with respect to
saturation lines. Determine;
(b) the volume occupied by the refrigerant initially,
(c) the work done, and
(d) the total heat transfer.
A piston–cylinder device contains 0.85 kg of refrigerant-134a at -10°C. The piston that is free to...
A piston–cylinder device contains 0.85 kg of refrigerant-134a at
-10°C. The piston that is free to move has a mass of 12 kg and a
diameter of 25 cm. The local atmospheric pressure is 88 kPa. Now,
heat is transferred to refrigerant-134a until the temperature is
10°C. Determine (a) the final pressure, (b) the change in the
volume of the cylinder, and (c) the change in the enthalpy of the
refrigerant-134a.
Refrigerant 134a, initially (state 1) a saturated liquid at -80C, is contained in a piston-cylinder assembly....
Refrigerant 134a, initially (state 1) a saturated liquid at
-80C, is contained in a piston-cylinder assembly. The water
undergoes a process to the corresponding saturated vapor (state 2),
during which the piston moves freely in the cylinder. The change of
state is brought about by heating the water as it undergoes an
internally reversible process at constant pressure and temperature.
If the mass of the refrigerant is 0.1 kg, determine (a) heat
transfer using first law of thermodynamics in kJ...
Refrigerant 134a in a cylinder-piston assembly is at 240 kPa with a quality 15% and then...
Refrigerant 134a in a cylinder-piston assembly is at 240 kPa with a quality 15% and then as a result of heat added the quality increases to 45%, what is the change in volume per one unit of mass (m3/kg)? The piston is assumed to move freely but it is sealed tight that does not allow mass exchange.
100 kg of R-134a at 320 kPa are contained in a piston-cylinder device whose volume is...
100 kg of R-134a at 320 kPa are contained in a piston-cylinder
device whose volume is 7.530 m3. The piston is now moved
until the volume is one-half its original size. This is done such
that the pressure of the R-134a does not change. Determine the
final temperature and the change in the total internal energy of
the R-134a. (Round the final answers to two decimal places.)
100 kg of R-134a at 200 kPa are contained in a piston–cylinder device whose volume is...
100 kg of R-134a at 200 kPa are contained in a piston–cylinder
device whose volume is 12.766 m3. The piston is now
moved until the volume is one-half its original size. This is done
such that the pressure of the R-134a does not change. Determine the
final temperature and the change in the total internal energy of
R-134a. Use data from the steam tables.
The final temperature is °C.
The total change in internal energy is kJ/kg.
A mass of 3 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder...
A mass of 3 kg of saturated liquid-vapor mixture of water is
contained in a piston-cylinder device at 175 kPa. Initially, 2 kg
of the water is in the liquid phase and the rest is in the vapor
phase. An electrical heater is in operation, and the piston rises
until it hits a set of stops, which are set at double the initial
volume. Electrical heating continues until the pressure reaches 500
kPa. Determine (a) the initial and final temperatures,...
A mass of 3 kg of saturated liquid-vapor mixture of water is contained in a piston-cylinder...
A mass of 3 kg of saturated liquid-vapor mixture of water is
contained in a piston-cylinder device at 175 kPa. Initially, 2 kg
of the water is in the liquid phase and the rest is in the vapor
phase. An electrical heater is in operation, and the piston rises
until it hits a set of stops, which are set at double the initial
volume. Electrical heating continues until the pressure reaches 500
kPa. Determine (a) the initial and final temperatures,...
A piston-cylinder device contains a saturated mixture of steam and water having a total mass of...
A piston-cylinder device contains a saturated mixture of steam
and water having a total mass of 0.5 kg at a pressure of 160 kPa
and an initial volume of 100 liters. Heat is then added and the
fluid expands at constant pressure until it reaches a saturated
vapor state.
a) Draw a diagram representing the process showing the initial
and final states of the system.
b) Sketch this process on a P-v diagram with respect to the
saturation lines, critical...
5 kg of butane (C4H10), contained in a piston-cylinder device undergoes a process from P1 =...
5 kg of butane (C4H10), contained in a piston-cylinder device
undergoes a process from P1 = 5 MPa, T1 = 500 K to P2 = 3 MPa and
T2 = 450 K during which the relationship between pressure and
specific volume is PVn = C.
a. Using the data from Generalized Compressibility chart, determine
the amount of work done during the process.
b. If butane is assumed an ideal gas, how would you compare the
work done during the process...
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