10 kg of steam is contained at 10 bar in a rigid vessel of
volume 2.275...
10 kg of steam is contained at 10 bar in a rigid vessel of
volume 2.275 m3. The vessel is cooled until the pressure
in the vessel is 7 bar. Calculate the amount of heat removed from
the steam.
Steam at 275ºC and 15.0 bar is contained in a rigid tank with
the volume of 10.0 m3 . In a constantvolume cooling process, the
pressure inside the tank drops to 1.8 bar and some of the steam
condenses. Calculate 1) the temperature of the tank contents after
the process, 2) the amount of steam condensed during the process
(in kg), and 3) the amount of heat removed from the tank during the
process.
Steam at 275ºC and 15.0 bar is contained in a rigid tank with
the volume of 10.0 m^3 . In a constant volume cooling process, the
pressure inside the tank drops to 1.8 bar and some of the steam
condenses. Calculate 1) the temperature of the tank contents after
the process, 2) the amount of steam condensed during the process
(in kg), and 3) the amount of heat removed from the tank during the
process.
Q1 (a)0.5 kg of water is contained in a rigid vessel at a
temperature of 125oC and a pressure of 232.1 kPa. The specific
enthalpy is 1050 kJ•kg-1. Which of the following could also be
correct?
(A) v = 0.001065 m3 •kg-1 (B) v = 0.7706 m3 •kg-1 (C) x = 0.24
(D) x = 0.5
(b).0.020 kg of air, initially at 20oC is compressed in a
perfectly insulated and sealed cylinder which is fitted with a
moveable piston. A...
A rigid, insulated, empty vessel is to be filled with steam from
a steam line at 7 bar and 320°C. Steam flows into the vessel until
the pressure in the vessel is 7 bar. At this instant the valve on
the charging line is closed.
(a) What is the temperature of the
steam in the vessel at the instant the valve is closed?
(b) What is the final pressure of
the steam in the vessel after it has reached mutual stable
equilibrium...
A rigid cylinder of volume 0.025 m^3 contains steam at 80 bar
and 350o C. The cylinder is cooled until the pressure is
50 bar. Calculate the state of the steam after cooling and the
amount of heat rejected by the steam. Sketch the process on the T-s
diagram indicating the area which represents the heat flow. Also
sketch the schematic of the system.
Consider 0.8 kg of N2 at 300 K, 1 bar contained in a
rigid tank connected by a valve to another rigid tank holding 0.3
kg of CO2 at 300 K, 1 bar. The valve is opened and gases
are allowed to mix, achieving an equilibrium state at 290 K.
Determine:
(a) the volume of each tank, in m3.
(b) the final pressure, in bar.
(c) the magnitude of the heat transfer to or from the gases during
the process,...
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)
2. A 1.00 m3 rigid vessel is filled with steam with a quality of
98.0% at 180◦C. Energy is added to the vessel until the pressure
reaches 3,000 kPa. Determine the following:
a) The initial pressure in the vessel
b) The mass of water in the vessel
c) The final temperature in the vessel
d) The change in enthalpy
Five kilograms of water is contained in a rigid, 3 m3 vessel at
P = 1 bar.
A. What is the temperature and physical state (liquid, vapor, or
both liquid and vapor) of the water?
B. What is the specific internal energy of the water in the
vessel?