Question

A tank of 0.1 m^{3} volume initially containing nitrogen
at 25 C and 1 bar will be filled with compressed nitrogen at a rate
of 20 mol/s. The nitrogen coming from the compressor and into the
tank is at an absolute pressure of 110 bar and a temperature of 80
C. The filling process occurs sufficiently rapidly that there is
negligible heat transfer between the gas and the tank walls, and a
valve is closed to stop the filling process when the pressure in
the tank reached 100 bar. Assume nitrogen is an ideal gas with a Cp
= 29.3 J/molK.

A) What is the nitrogen temperature immediately after the filling process ends?

B) How long did it take for the pressure of the gas in the tank to reach 100 bar?

C) After a sufficiently long period of time, due to heat transfer with the surroundings, the temperature of the gas drops to 25 C. What is the pressure of the nitrogen in the tank?

Answer #1

A) A tank with volume 5m^3 is to be pressure tested before use.
Tank is going to be filled with a 30 bar source at 20 C (degrees
Celsius)and tested to 15 bar . Assume no heat transfer to or from
the surroundings, what is the temperatue of the gas after the
filling process if the tank orignially contained air at 1 bar and
20C (Celsius). Assume Ideal Gas with Cp= 3.5R
B) after some very long time has passed,...

A rigid copper tank, initially containing 1 m3 of air at 295 K,
4 bar, is connected by a valve to a large supply line carrying air
at 295 K, 15 bar. The valve is opened only as long as required to
fill the tank with air to a pressure of 15 bar. Finally, the air in
the tank is at 310 K. The copper tank, which has a mass of 20 kg,
is at the same temperature as the...

A rigid tank, with a volume of 25 L, contains nitrogen at 355 K and 1.2 MPa. The tank is then cooled to 120 K. What work has been done and the heat transferred in this process? Data: Cv = 0.745 kJ/kgK, Cp = 1.042 kJ/kgK, MM(N2)=28 g/mol, R = 8.314 m^3 Pa/molK.
Use the ratio PV = nRT to determine the amount of nitrogen contained in the tank.

A 0.6-m3 rigid tank is filled with saturated
liquid water at 170
°C. A valve at the bottom of
the tank is now opened, and one-half of the total mass is withdrawn
from the tank in liquid
form. Heat is transferred to water from a source of 210 °C so that
the temperature in the tank
remains constant. Determine (a) the amount of heat transfer and (b)
the reversible work and
exergy destruction for this process. Assume the surroundings to...

A nonconducting tank of negligible heat capacity and 1
m3
volume is connected to
pipeline containing steam at 5 bar and 370℃, filled with steam
to a pressure of 5 bar,
and disconnected from the pipeline. If the tank initially
contains steam at 1 bar and 150℃, how much steam is in the
tank at the end of the filling process, and what is its
temperature?
Note: The answer is 1.56kg and 425c but I can’t figure out how
to...

Q3. A tank with rigid walls and a volume of
0.05 m3 initially has a two-phase liquid- vapor mixture of ammonia
at a pressure of 4 bar and a quality of 10%. The tank is then
heated such that the pressure is kept constant through a
pressure-regulating valve that allows saturated vapor to escape.
The heating continues until the quality of the mixture in the tank
is 40%. Assume kinetic and potential energy changes are
insignificant. Determine:
(i) The final...

Tank #1 initially at 40 bar and temperature of 200 K is
connected to a cylinder of equal volume at 1 bar and 250 K. Gas
flows until the pressure is equalized. There is no heat transfer
between the tanks. What are the final temperatures of the
tanks?

An insulated cylinder is filled with nitrogen gas at 25ºC and
1.00 bar. The nitrogen is then compressed adiabatically with a
constant pressure of 5.00 bar until equilibrium is reached. i. What
is the final temperature of the nitrogen if it is treated as an
ideal gas with molar heat capacity CP = 7/2 R ?
ii. Calculate ΔH (in kJ mol-1 ) and ΔS (in J mol-1 K-1 ) for the
compression. (Hint: Because the enthalpy is a state...

5 m3 of sulphur trioxide is initially at 150 °C and
60 bar undergo an isochoric heating process to a final pressure of
70 bar. Calculated the heat transfer (kJ) for the process. (assume
ideal gas)

A rigid tank has a volume of 0.01 m3. It
initially contains saturated water at a temperature of 200
oC and a quality of 0.4. The top of the
tank contains a pressure regulating valve which maintains the vapor
at constant pressure. This system undergoes a process where it is
heated until all the liquid vaporizes. How much heat in (kJ) is
required? You may assume there is no pressure drop in the exit
line.

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 11 minutes ago

asked 11 minutes ago

asked 13 minutes ago

asked 13 minutes ago

asked 16 minutes ago

asked 16 minutes ago

asked 16 minutes ago

asked 19 minutes ago

asked 24 minutes ago

asked 25 minutes ago

asked 25 minutes ago

asked 31 minutes ago