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In: Physics
Question 3 Air of 0.1kg with a pressure of 0.15 bar and a volume of 0.07...
Question 3 Air of 0.1kg with a pressure of 0.15 bar and a volume of 0.07 m3 are compressed isentropically to a volume of 0.015 m3 .
(a) Calculate the work transfer in the compression process
(b) Calculate the heat transfer in the compression process
(c) Compare (a) and (b) with an isothermal compression process.
(d) Sketch the pressure-volume diagram for the isentropic and isothermal processes.
Solutions
genius_generous answered 2 years agoRelated Solutions
A mass of 0.07 kg of air at a temperature of 30°C and pressure 100 kPa...
A mass of 0.07 kg of air at a temperature of 30°C and pressure
100 kPa is compressed to a pressure of 600 kPa, according to the
law:
(i.e. Polytropic process, n=1.3). Determine:
i.The final volume
ii.The final temperature
iii.The work transfer
iv.The change in internal energy
v.The heat transfer
. Air in a 0.3 m3 cylinder is initially at a pressure of 10 bar and...
. Air in a 0.3 m3 cylinder is initially at a pressure of 10 bar
and a temperature of 330 K. The cylinder is to be emptied by
opening a valve and letting the pressure drop to that of the
atmosphere. What will be the final temperature and mass of gas in
the cylinder if this is accomplished:
a) In a manner that maintains the temperature of the gas at 330
K?
b) In a well-insulated cylinder (Answer: Tfinal =...
Air (280 K and atmospheric pressure) enters a 3-m-long rectangular duct (0.15 m by 0.075 m)...
Air (280 K and atmospheric pressure) enters a 3-m-long
rectangular duct (0.15 m by 0.075 m) whose surface temperature is
at 400 K. Air mass flow rate is 0.10 kg/s. Find the heat transfer
and the outlet temperature. Use the Sieder-Tate equation to solve
for the heat transfer coefficient.
using the temperature of air, barometric pressure, and volume of flask, calculate moles of air for...
using the temperature of air, barometric pressure, and volume of
flask, calculate moles of air for each trial.
trial 1: temperature of air: 20.1 deg Celcius, barometric
pressure: 742.44 Hg, volume of flask: 285 ml
Trial 2: Temp of air 20.2 deg celcius. Barametric pressure:
742.44 Hg , volume : 285 ml
A gas which occupies a volume of 0.2 m³ at a pressure of 1 bar is...
A
gas which occupies a volume of 0.2 m³ at a pressure of 1 bar is
expanded to a final pressure of 7.0 bar. The pressure of the gas
varies according to the relation P = 1200 V + b. where P is in kPa,
V is in m³ and b is a constant. Calculate the work done by the
gas.
A flask has a volume of 159.6 mL . When filled with air at a pressure...
A flask has a volume of 159.6 mL . When filled with air at a
pressure of 749.2 torr and a temperature of 25.54 ∘C, the flask and
air have a mass of 55.598 g . When filled with carbon dioxide at
the same temperature and pressure, the mass of the flask and
CO2 is 55.699 g .
What is the mass of the carbon dioxide gas in the flask (when
the flask is filled with carbon dioxide)?
What is...
1) If the volume of the lungs increases, what happens to the air pressure inside the...
1) If the volume of the lungs increases, what happens to the air
pressure inside the lungs?
Select one:
a. increases twice the amount of the increase in volume
b. increases
c. remains constant
d. increases and possibly damages the lungs
e. decreases
2) During exercise, which of the following contract for active
exhalation?
Select one:
a. rectus abdominis and internal intercostal muscles
b. pectoralis major and serratus anterior muscles
c. diaphragm and internal intercostal muscles
d. rectus abdominis and...
Air that occupies a volume of 0.142m3 at a gauge pressure of 103kPa, expands isothermally to...
Air that occupies a volume of 0.142m3 at a gauge pressure of
103kPa, expands isothermally to zero gauge pressure and then is
cooled to constant pressure until it reaches its initial volume.
Calculate the work done on the gas.
Answer: -5.74 kJ
A compressor, operating at steady-state, increases the pressure of an air stream from 1 bar to...
A compressor, operating at steady-state, increases the pressure
of an air stream from 1 bar to 10 bar while losing 4.2 kW of heat
to the surroundings. At the compressor inlet, the air is at 25o C
and has a velocity of 14 m/s. At the compressor outlet, the air is
at 350o C and has a velocity of 2.4 m/s. If the compressor inlet
has a cross-sectional area of 500 cm2 and the air behaves as an
ideal gas,...
A compressor, operating at steady-state, increases the pressure of an air stream from 1 bar to...
A compressor, operating at steady-state, increases the pressure
of an air stream from 1 bar to 10 bar while losing 4.2 kW of heat
to the surroundings. At the compressor inlet, the air is at 25o C
and has a velocity of 14 m/s. At the compressor outlet, the air is
at 350o C and has a velocity of 2.4 m/s. If the compressor inlet
has a cross-sectional area of 500 cm2 and the air behaves as an
ideal gas,...
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