Homework Answers
Add Answer to:
What is the enthalpy of 2 kg of hydrogen gas at 500 K and 100 kPa?...
Calculate the enthalpy change of air, in kJ/kg, if the state changed from 99 kPa and...
Calculate the enthalpy change of air, in kJ/kg, if the state changed from 99 kPa and 35oC to 801 kPa and 419 oC using the equation of state P(v - a) = RT where a = 0.0098 m3/kg, and compare the result to the value obtained by using the ideal gas equation of state. (5 marks
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
Is this process possible and why? 73 Air at 500 kPa, 980 K enters a turbine...
Is this process possible and why?
73 Air at 500 kPa, 980 K enters a turbine operating at steady state and exits at 200 kPa, 680 K. Heat transfer from the turbine occurs at an average outer surface temperature of 320 K at the rate of 40 kJ per kg of air flowing. Kinetic and potential energy effects are negligible. For air as an ideal gas with c, 1.5 kJ/kg K, determine (a) the rate power is developed in kJ...
J. An adiabatie gas turbine espands air at 1300 kPa and 500P C to 100 kPa and 127"C Au ers turbine through a 02-...
J. An adiabatie gas turbine espands air at 1300 kPa and 500P C to 100 kPa and 127"C Au ers turbine through a 02-m opening with an average velocity of 40 m/s, and exhausts through a 1-m opening Detormine (a) the mass fnow rate of air through the turbine and (b) the power produced by the turbine For air, take the ideal gas constant and specific heat value at constant pressure as o Yue Determine (a) the mass flow rate...
An ideal gas has a gas constant R = 0.3 kJ / kg K and the...
An ideal gas has a gas constant R = 0.3 kJ / kg K and the specific heat at constant volume is Cv = 0.7 kJ / Kg K. If the gas has a temperature change of 100 ° C. Choose the correct answer by making the corresponding calculations or justifications for each of the following cases: The change in enthalpy in KJ / kg a) 30 b) 70 c) 100 d) Insufficient information The work done is in kJ...
100 kg/hr of air is compressed from 110 kPa and 255 K (where it has an...
100 kg/hr of air is compressed from 110 kPa and 255 K (where it has an enthalpy of 489 kJ/kg) to 1000 kPa and 278 K (where it has an enthalpy of 509 kJ/kg). The exit velocity of the air from the compressor is 60 m/s. The inlet velocity is very small and can be neglected. The process is adiabatic and there is no change in height during the process. a) Label all known information on the diagram. State if...
Air is compressed by an adiabatic compressor from P2=100 kPa to P2=500 kPa. T2=380 K and...
Air is compressed by an adiabatic compressor from P2=100 kPa to P2=500 kPa. T2=380 K and T2=650 K. Air is an ideal gas with variable specific heats. Determine a) The exit temperature of the air for the isentropic case. Each of the above temperatures and pressures are given as actual. b) The efficiency of the compressor.
A combined cycle gas turbine / vapor power plant uses the turbine exhaust as the energy...
A combined cycle gas turbine / vapor power plant uses the turbine exhaust as the energy source for the boiler. Each power system uses a single turbine. The gas power system is modeled as an ideal air-standard Brayton cycle. The vapor power system is modeled as an ideal Rankine cycle. Given specific operating conditions determine the temperature and pressure at each state, the rate of heat transfer in the boiler, the power output of each turbine, and the overall efficiency....
3 kg of nitrogen gas initially at a temp: 295K and a pressure of 100 kPa...
3 kg of nitrogen gas initially at a temp: 295K and a pressure of 100 kPa is compressed to a higher pressure. the internal energy change during this process is 70 kJ/kg. Determine the final temperature of the nitrogen. perform two iterations with average specific heats. Please use ideal gas law PV=nRT if possible ** Please answer both questions for quick thumbs up and comment!!! 1) 2) Find the final temp of the gas Perform two iterations using average specifc...
Combustion gases enter an adiabatic gas turbine at 800oC and 900 kPa and leave at 100...
Combustion gases enter an adiabatic gas turbine at 800oC and 900 kPa and leave at 100 kPa with a low velocity. Treating the combustion gases as air (R = 0.2870 kPa*m3/kg, cp = 1.005 kJ/kg*K, k = 1.4) and assuming an isentropic efficiency of 82 percent, determine the work output of the turbine and the exit temperature.
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
Is this process possible and why?
73 Air at 500 kPa, 980 K enters a turbine operating at steady state and exits at 200 kPa, 680 K. Heat transfer from the turbine occurs at an average outer surface temperature of 320 K at the rate of 40 kJ per kg of air flowing. Kinetic and potential energy effects are negligible. For air as an ideal gas with c, 1.5 kJ/kg K, determine (a) the rate power is developed in kJ...
J. An adiabatie gas turbine espands air at 1300 kPa and 500P C to 100 kPa and 127"C Au ers turbine through a 02-m opening with an average velocity of 40 m/s, and exhausts through a 1-m opening Detormine (a) the mass fnow rate of air through the turbine and (b) the power produced by the turbine For air, take the ideal gas constant and specific heat value at constant pressure as o Yue Determine (a) the mass flow rate...
Air is compressed by an adiabatic compressor from P2=100 kPa to P2=500 kPa. T2=380 K and T2=650 K. Air is an ideal gas with variable specific heats. Determine a) The exit temperature of the air for the isentropic case. Each of the above temperatures and pressures are given as actual. b) The efficiency of the compressor.
3 kg of nitrogen gas initially at a temp: 295K and a pressure of 100 kPa is compressed to a higher pressure. the internal energy change during this process is 70 kJ/kg. Determine the final temperature of the nitrogen. perform two iterations with average specific heats. Please use ideal gas law PV=nRT if possible ** Please answer both questions for quick thumbs up and comment!!! 1) 2) Find the final temp of the gas Perform two iterations using average specifc...
Most questions answered within 3 hours.
-
1.histones are proteins that make up nucleosomes. they bind to
the backbone of DNA in chromosomes....
asked 6 minutes ago -
What is the relationship between a variables value and their
probabilities as it is summarized by...
asked 15 minutes ago -
Balance Sheet
DR
CR
Cash
10000
AR
7000
Supplies
500
Equipment
5,000
Accum depreciation
...
asked 13 minutes ago -
Country
Continent
GDP (millions of US$)
Afghanistan
Asia
 
asked 16 minutes ago -
1) Use the Euclidean algorithm (write in pseudocode) to find the
greatest common divisor of 8...
asked 38 minutes ago -
Based upon the corporate proposal for this week, research three
different data storage options for your...
asked 40 minutes ago -
The equilibrium constant, Kp , for the following reaction is
1.04×10-2 at 548 K. NH4Cl(s) NH3(g)...
asked 1 hour ago -
During a recent budgeting discussion, the CFO at "NW Accounting
Services" proposed eliminating the marketing research...
asked 58 minutes ago -
Block B has a mass of 3.80kg and is moving to the left at a
speed...
asked 1 hour ago -
If n distinct objects are distributed randomly into
n distinct boxes, what is the probability that:...
asked 1 hour ago -
a) The frequency of light coming out from a laser source is 297
MHz. What is...
asked 1 hour ago -
LABORATORY EXERCISES:
Using nested for loops, write a java program to print the
pattern as shown...
asked 1 hour ago