Air at 300 K, 100 kPa in a rigid box is heated to 1000 K by...
Air at 300 K, 100 kPa in a rigid box is heated to 1000 K by a 1500 K source.
a_ Find the final pressure.
b_ Find the specific heat transfer.
c_ Find the total entropy generation per kg air.
Homework Answers
A compressor takes in air at 100 kPa and 300 K and outputs at a pressure...
A compressor takes in air at 100 kPa and 300 K and outputs at a pressure of 1100 kPa using 220 kJ/kg of energy. If the outlet temperature is 500 K and the steady-state wall temperature is maintained at 400 K, find the rate of entropy generation.
Problem 1 [15 pts] Air (R=0.287 kJ/kgK), initially at 300 K and 100 kPa is heated...
Problem 1 [15 pts] Air (R=0.287 kJ/kgK), initially at 300 K and 100 kPa is heated to 450 K in an internally reversible closed system process. You do NOT need to show a system sketch for this problem. Using variable (temperature dependent) specific heats a. Find the specific entropy change (As= S2-S1) of air if the process occurs at constant pressure b. Find the specific entropy change (As= S2-S1) of air if the process occurs at constant volume c. Show...
12) A scuba tank contains an air at 300 kPa and 600 K. Half of the...
12) A scuba tank contains an air at 300 kPa and 600 K. Half of the air is withdrawn from the tank leaving the tank at a pressure of 100 kPa. Assuming no heat transfer, what is the temperature of the gas when the process is complete? (a) 100 K (b) 200 K (c) 300 K (d) 400 K (e) 500 K 13) A 0.6875 cubic meter rigid tank contains 0.5 kg of steam at 0.4 Mpa. The steam is...
12) A scuba tank contains an air at 300 kPa and 600 K. Half of the...
12) A scuba tank contains an air at 300 kPa and 600 K. Half of the air is withdrawn from the tank leaving the tank at a pressure of 100 kPa. Assuming no heat transfer, what is the temperature of the gas when the process is complete? (a) 100 K (b) 200 K (c) 300 K (d) 400 K (e) 500 K 13) A 0.6875 cubic meter rigid tank contains 0.5 kg of steam at 0.4 Mpa. The steam is...
A piston-cylinder assembly initially contains 0.8 kg of air at 100 kPa and 300 K. It...
A piston-cylinder assembly initially contains 0.8 kg of air at 100 kPa and 300 K. It is then compressed in a polytropic process PV3 = C to half the original volume. Assuming the ideal gas model for air and specific heat ratio is constant, k=1.4, determine (a) the final temperature, (b) work and heat transfer, each in kJ. R= 0.287 kJ/kg K. W, 82
A compressor works on a pressure of 105 kPa and temperature 300 K in a Brayton...
A compressor works on a pressure of 105 kPa and temperature 300 K in a Brayton cycle and has an efficiency of 45%. The exhaust temperature is 700 K. Find the pressure ratio and the specific heat addition by the combustion for this cycle. The inlet pressure of an air compressor is 100 kPa, with temperature 290 K, and brings it to 600 kPa, after which the air is cooled in an intercooler to 330K by heat transfer to the...
A halloon containing air has an initial temperature of 300 K. The baloon is heated and...
A halloon containing air has an initial temperature of 300 K. The baloon is heated and expands a polytropic process wit, n-(-2) until譨hits a rigid spherKal wire cage and can't expand any more. When the balloon first hits the 2 m' wire eage the conditions in the balloon are 1000 K and 200kPa. The heating then continues until finally the temperature in the balloon is 1200 K Wire Cage What is the mass of the air in the balloon?. What...
0.15 kg of air in a frictionless piston cylinder at 100 kPa and 600 K is...
0.15 kg of air in a frictionless piston cylinder at 100 kPa and 600 K is cooled to a final temperature of 25°C by heat rejection to the surroundings which are at a temperature of 25°C. (a) Show the process on a P-v diagram with lines of constant temperature, and on a T-s diagram with lines of constant pressure. (b) Determine the total work done and the total heat transfer for the process. (c) Calculate the entropy change for the...
4) Volume 2.5 m^3 air in a rigid tank with initial pressure 100 kPa and temperature...
4) Volume 2.5 m^3 air in a rigid tank with initial pressure 100 kPa and temperature 25°C There. It is applied to the tank feed line by a valve. Pressure of air flowing through the supply line 600 kPa and temperature is 25°C. By opening the valve, the pressure of the air in the tank is air entering the tank until it is equal to the pressure of the air It is closed. A thermometer placed in the tank lasts...
Air is contained in a 100 liter rigid tank and is initially at 40 oC and...
Air is contained in a 100 liter rigid tank and is initially at 40 oC and 900 kPa. The air is cooled until the pressure drops to 400 kPa. Find the final temperature and the amount of heat transfer during the process. Consider air as ideal gas with constant specific heat.
Problem 1 [15 pts] Air (R=0.287 kJ/kgK), initially at 300 K and 100 kPa is heated to 450 K in an internally reversible closed system process. You do NOT need to show a system sketch for this problem. Using variable (temperature dependent) specific heats a. Find the specific entropy change (As= S2-S1) of air if the process occurs at constant pressure b. Find the specific entropy change (As= S2-S1) of air if the process occurs at constant volume c. Show...
12) A scuba tank contains an air at 300 kPa and 600 K. Half of the air is withdrawn from the tank leaving the tank at a pressure of 100 kPa. Assuming no heat transfer, what is the temperature of the gas when the process is complete? (a) 100 K (b) 200 K (c) 300 K (d) 400 K (e) 500 K 13) A 0.6875 cubic meter rigid tank contains 0.5 kg of steam at 0.4 Mpa. The steam is...
12) A scuba tank contains an air at 300 kPa and 600 K. Half of the air is withdrawn from the tank leaving the tank at a pressure of 100 kPa. Assuming no heat transfer, what is the temperature of the gas when the process is complete? (a) 100 K (b) 200 K (c) 300 K (d) 400 K (e) 500 K 13) A 0.6875 cubic meter rigid tank contains 0.5 kg of steam at 0.4 Mpa. The steam is...
A piston-cylinder assembly initially contains 0.8 kg of air at 100 kPa and 300 K. It is then compressed in a polytropic process PV3 = C to half the original volume. Assuming the ideal gas model for air and specific heat ratio is constant, k=1.4, determine (a) the final temperature, (b) work and heat transfer, each in kJ. R= 0.287 kJ/kg K. W, 82
A halloon containing air has an initial temperature of 300 K. The baloon is heated and expands a polytropic process wit, n-(-2) until譨hits a rigid spherKal wire cage and can't expand any more. When the balloon first hits the 2 m' wire eage the conditions in the balloon are 1000 K and 200kPa. The heating then continues until finally the temperature in the balloon is 1200 K Wire Cage What is the mass of the air in the balloon?. What...
0.15 kg of air in a frictionless piston cylinder at 100 kPa and 600 K is cooled to a final temperature of 25°C by heat rejection to the surroundings which are at a temperature of 25°C. (a) Show the process on a P-v diagram with lines of constant temperature, and on a T-s diagram with lines of constant pressure. (b) Determine the total work done and the total heat transfer for the process. (c) Calculate the entropy change for the...
4) Volume 2.5 m^3 air in a rigid tank with initial pressure 100 kPa and temperature 25°C There. It is applied to the tank feed line by a valve. Pressure of air flowing through the supply line 600 kPa and temperature is 25°C. By opening the valve, the pressure of the air in the tank is air entering the tank until it is equal to the pressure of the air It is closed. A thermometer placed in the tank lasts...
Most questions answered within 3 hours.
-
find the critical value associated with a right sided hypothesis of
the mean using a sample...
asked 1 hour ago -
Which of the following statements is true with respect to a
simple linear regression model?
a....
asked 2 hours ago -
The energy required to remove an electron from a surface of a
solid element is called...
asked 3 hours ago -
How would you train your employees to avoid risks of using
mobile devices?
asked 3 hours ago -
Assume Kw = 1.01 ✕ 10−14
For pure water, we can calculate [H3O+ ] = [OH...
asked 4 hours ago -
Suppose that on a temperature scale X, water boils at 203.0°X
and freezes at -105.7°X. What...
asked 5 hours ago -
BaS crystallizes in a cubic unit cell with S2- ions on each
corner and each face....
asked 6 hours ago -
A. 0≤P(Oi)≤10≤P(Oi)≤1 for each i
B. P(Oi)≤0P(Oi)≤0
C. P(Oi)=1+P(OCi)P(Oi)=1+P(OiC)
D. P(Oi)≥1P(Oi)≥1
If an experiment consists of...
asked 7 hours ago -
A battery has an emf of 9.20V and an internal resistance of 1.20
ohm. a)What resistance...
asked 7 hours ago -
The area of an elastic circular loop decreases at a constant
rate, dA/dt = −6.60×10−3 m2/s...
asked 8 hours ago -
The denaturation of proteins can be described by the
equilibrium
F⇌U
where F and U represent...
asked 10 hours ago -
Please answer what the maximum and minimum force is, and the
angle on the ion is...
asked 10 hours ago