HomeworkLib
Question

Hydrogen gas (H2) is initially at a pressure of 20 bar and temperature of 300'C (state...

Hydrogen gas (H2) is initially at a pressure of 20 bar and temperature of 300'C (state 1), while occupying a volume of 0.5 m3 in a frictionless piston-cylinder arrangement. The gas then undergoes a reversible cycle in which it expands isothermally to a pressure of 8 bar (state 2). This is then followed by adiabatic compression to restore the pressure back to 20 bar. The cycle is then completed by a constant pressure process. Sketch the process of p-v and T-s diagrams. Assuming perfect gas behaviour, determine: a) The work done by each process b) The heat transfer in process 1-2 c) The entropy change in each process (For hydrogen take cp=14.4 kJ/kgK and relative molecular mass, M=2) Ans: 2a) 916.3kJ, -750kJ b)916.3kJ c)1.6kJ/K, 0, -1.58 kJ/K Please show the detailed solutions. Thanks.

engineering   Mechanical-Engineering   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
Hydrogen gas (H2) is initially at a pressure of 20 bar and temperature of 300'C (state...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • An ideal gas initially at 600K and 10 bar undergoes a four-step mechanically reversible cycle in...

    An ideal gas initially at 600K and 10 bar undergoes a four-step mechanically reversible cycle in a closed system. In step 12 (the process that changes the system from State 1 to State 2), pressure decreases isothermally to 3bar; in step 23, pressure decreases at constant volume to 2bar; in step 34 volume decreases at constant pressure; and in step 41, the gas returns adiabatically to its initial state. Take Cp=(7/2)R and Cv=(5/2)R. Determine the efficiency of the cycle. (Hint:...

  • One mole of an ideal monoatomic gas is initially at 300 K and 5 bar of...

    One mole of an ideal monoatomic gas is initially at 300 K and 5 bar of pressure inside a cylinder with a frictionless piston. a) The cylinder is kept in a heat bath and the gas is allowed to expand under 1 bar of external pressure. Calculate the work and heat associated with this process. b) Calculate the change in enthalpy for isothermal expansion at constant pressure. c) Alternatively, the gas is allowed to expand isothermally under near-equilibrium conditions. Calculate...

  • 1. A) Argon contained in a closed, rigid tank, initially at 36.3°C, 2.8 bar, and a...

    1. A) Argon contained in a closed, rigid tank, initially at 36.3°C, 2.8 bar, and a volume of 1.4 m3, is heated to a final pressure of 9.9 bar. Assuming the ideal gas model with k = 1.53 for the argon, determine the heat transfer, in kJ. B) Nitrogen (N2) contained in a piston–cylinder arrangement, initially at 6 bar and 435 K, undergoes an expansion to a final temperature of 300 K, during which the pressure–volume relationship is pV1.5 =...

  • 1.Argon contained in a closed, rigid tank, initially at 62.3°C, 3.9 bar, and a volume of...

    1.Argon contained in a closed, rigid tank, initially at 62.3°C, 3.9 bar, and a volume of 4.2 m3, is heated to a final pressure of 9.4 bar. Assuming the ideal gas model with k = 1.6 for the argon, determine the heat transfer, in kJ. 2.Water vapor contained in a piston–cylinder assembly undergoes an isothermal expansion at 223°C from a pressure of 5.4 bar to a pressure of 1.9 bar. Evaluate the work, in kJ/kg. 3.A mass of 4 kilograms...

  • In a gas turbine, gas enters the turbine at a temperature of 600'C and 5 bar...

    In a gas turbine, gas enters the turbine at a temperature of 600'C and 5 bar of pressure and exit at a pressure of 1 bar. This process is an adiabatic process but the change in entropy is 0.250 kJ/kg K. Determine the temperature of exit gas. Assumed that the gas is an ideal gas and take the value of y=1.3 and cp = 1.11 kJ/kg K. Sketch the process on a T-s diagram. Determine the temperature of the exit...

  • One hundred cubic meters of carbon dioxide initially at 150 degrees Celsius and 50 bar is...

    One hundred cubic meters of carbon dioxide initially at 150 degrees Celsius and 50 bar is to be isothermally compressed in a frictionless piston-and-cylinder device to a final pressure of 300 bar. Assume that this is a reversible process. a.) Use the ideal gas equation of state to calculate: i. The volume of the compressed gas ii. The work done to compress the gas iii. The heat flow on compression b.) Use the van der Waals equation of state to...

  • 2 140 pt) Reversible Adiabatic Expansion of Nitrogen. Nitrogen expands reversibly in an insulated cylinder fitted...

    2 140 pt) Reversible Adiabatic Expansion of Nitrogen. Nitrogen expands reversibly in an insulated cylinder fitted with a piston. The N2 is initially at 500K and 5 bar pressure and expands to a final pressure of 1 bar. Determine the final temperature T of the N2 (in K) as well as the work done in the process W (mol), assuming N2 to be in the ideal gas state. Heat capacity, Cp is equal to a constant at 3.560R.

  • A Carnot cycle is conducted using an ideal diatomic gas. Initially, the gas is at temperature...

    A Carnot cycle is conducted using an ideal diatomic gas. Initially, the gas is at temperature 25C., pressure of 100KPa and volume of 0.01m3. The system is then compressed isothermally to a volume 0.002m3. From that point, the gas undergoes an adiabatic compression ( with gamma= 1.4), until the volume further reduces to 0.001m3. After that, the system goes an isothermal expansion process to a point where the pressure of the system is 263.8KPa. Then the system continues the cycle...

  • A system consists of 2.320 g of carbon monoxide gas initially at temperature 400.0 K and...

    A system consists of 2.320 g of carbon monoxide gas initially at temperature 400.0 K and pressure 0.6250 bar. Assume the heat capacity of carbon monoxide is constant at the value found for 298.15 K in the data tables of the Appendix (see also Figure 2.8). The system undergoes the following cyclic process: Step a) Reversible isothermal expansion to double the initial volume. Step b) Constant volume extraction of heat from the system (to a temperature and pressure consistent with...

  • 2. One mole of an ideal gas, CP - (7/2)R and CV - (5/2)R, is compressed...

    2. One mole of an ideal gas, CP - (7/2)R and CV - (5/2)R, is compressed adiabatically in a piston/cylinder device from 2 bar and 25°C to 7 bar. The process is irreversible and requires 35% more work than a reversible, adiabatic compression from the same initial state to the same final pressure. What is the entropy change of the gas?

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT