thermodynamics Archives - Page 6 of 9

Sign Up

Sign Up to our questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
👉Note: After Sign Up. A confirmation mail will be sent to your registered email account, If you have not received the confirmation mail, kindly Check Your Spam Mails.

Sign In

Forgot Password

Lost your password? Please enter your email address. You will receive a link and will create a new password via email. If not received mail yet, please check your spam mails.

Username* Please type your username.

E-Mail* Please type your E-Mail.

Question Title*

Please choose an appropriate title for the question so it can be answered easily.

Category* Please choose the appropriate section so the question can be searched easily.

Tags Please choose suitable Keywords Ex: question, poll.

Is this question is a poll? If you want to be doing a poll click here.

Image poll?

Featured image

Browse

Details*

Type the description thoroughly and in details.

Add a Video to describe the problem better.

Video type Choose from here the video type.

Video ID Put Video ID here: https://www.youtube.com/watch?v=sdUUx5FdySs Ex: "sdUUx5FdySs".

Ask Anonymously

Get notified by email when someone answers this question.

By asking your question, you agree to the Terms of Service and Privacy Policy .*

Please briefly explain why you feel this question should be reported.

Please briefly explain why you feel this answer should be reported.

Please briefly explain why you feel this user should be reported.

Ask A Question

Tuntun KumarBegginer

Asked: 2 months agoIn: Mechanical Engineering

5 kg of air at 40°C and 1 bar is heated in a reversible non-flow constant pressure until the volume is doubled. Find the (a) change in volume, (b) work done, (c) change in internal energy and (d) change in enthalpy.

5 kg of air at 40°C and 1 bar is heated in a reversible non-flow constant pressure until the volume is doubled. Find the (a) change in volume, (b) work done, (c) change in internal energy and (d) ...Read more

Tuntun KumarBegginer

Asked: 2 months agoIn: Mechanical Engineering

A certain gas of volume 0.4 m3, pressure of 4.5 bar and temperature of 130°C is heated in a cylinder to 9 bar when the volume remains constant. Calculate the (i) temperature at the end of the process, (ii) the heat transfer, (iii) change in internal energy (iv) work done by the gas, (v) change in enthalpy and (vi) mass of the gas. Assume Cp = 1.005 kJ/kgK and Cv = 0.71 kJ/kgK.

A certain gas of volume 0.4 m3, pressure of 4.5 bar and temperature of 130°C is heated in a cylinder to 9 bar when the volume remains constant. Calculate the (i) temperature at the end of the process, ...Read more

Tuntun KumarBegginer

Asked: 2 months agoIn: Mechanical Engineering

In a vessel 10 kg of O2 is heated in a reversible non-flow constant volume process so that the pressure of O2 is increased two times that of initial value. The initial temperature is 20°C. Calculate the final temperature, change in internal energy, change in enthalpy and heat transfer. Take R = 0.259 kJ/kg K and Cv = 0.625 kJ/kg K for oxygen.

In a vessel 10 kg of O2 is heated in a reversible non-flow constant volume process so that the pressure of O2 is increased two times that of initial value. The initial temperature is 20°C. Calculate the final ...Read more

Tuntun KumarBegginer

Asked: 2 months agoIn: Mechanical Engineering

Mass of 15 kg of air in a piston cylinder device is heated from 25°C to 90°C by passing current through a resistance heater inside the cylinder. The pressure inside the cylinder is held constant at 300 kPa during the process and a heat loss of 60 kJ occurs. Determine the electrical energy supplied in kW-hr and change in internal energy.

Mass of 15 kg of air in a piston cylinder device is heated from 25°C to 90°C by passing current through a resistance heater inside the cylinder. The pressure inside the cylinder is held constant at 300 kPa ...Read more

Tuntun KumarBegginer

Asked: 2 months agoIn: Mechanical Engineering

An insulated rigid tank having 5 kg of air at 3 atm and 30°C is connected to an air supply line at 8 atm and 50°C through a valve. The valve is now slowly opened to allow the air from the supply line to flow into the tank until the tank pressure reaches 8 atm and the valve is closed. Determine the final temperature of the air in the tank. Also, find the amount of air added to the tank.

An insulated rigid tank having 5 kg of air at 3 atm and 30°C is connected to an air supply line at 8 atm and 50°C through a valve. The valve is now slowly opened to allow the ...Read more

Tuntun KumarBegginer

Asked: 2 months agoIn: Mechanical Engineering

A system receives 200 kJ of energy as heat, at constant volume. Then it is cooled at constant pressure when 50 kJ of work was done on the system while it rejects 70 kJ of heat. Supposing the system is restored to the initial state by an adiabatic process, how much work will be done by the system?

A system receives 200 kJ of energy as heat, at constant volume. Then it is cooled at constant pressure when 50 kJ of work was done on the system while it rejects 70 kJ of heat. Supposing the ...Read more

Tuntun KumarBegginer

Asked: 2 months agoIn: Mechanical Engineering

A piston cylinder assembly contains air (ideal gas with γ = 1.4) at 200 kPa and occupies a volume of 0.01 m3. The piston is attached to one end of a spring and the other end of the spring is fixed to a wall. The force exerted by a spring on the piston is proportional to the decrease in length of the spring from its natural length. The ambient atmospheric pressure is 100 kPa. Now, the air in the cylinder is heated till the volume is doubled and at this instant, it is found that the pressure of the air in the cylinder is 500 kPa. Calculate the work done by the gas.

A piston cylinder assembly contains air (ideal gas with γ = 1.4) at 200 kPa and occupies a volume of 0.01 m3. The piston is attached to one end of a spring and the other end of the ...Read more

Tuntun KumarBegginer

Asked: 2 months agoIn: Mechanical Engineering

A rigid tank containing 0.4 m3 of air at 400 kPa and 30°C is connected by a valve to a piston cylinder device with zero clearance. The mass of the piston is such that a pressure of 200 kPa is required to raise the piston. The valve is opened slightly and air is allowed to flow into the cylinder until the pressure of the tank drops to 200 kPa. During this process, the heat is exchanged with the surrounding such that the entire air remains at 30°C at all times. Determine the heat transfer for this process.

A rigid tank containing 0.4 m3 of air at 400 kPa and 30°C is connected by a valve to a piston cylinder device with zero clearance. The mass of the piston is such that a pressure of 200 ...Read more

Tuntun KumarBegginer

Asked: 2 months agoIn: Mechanical Engineering

In a new temperature scale say °ρ, the boiling and freezing points of water at one atmosphere are 100°ρ and 300°ρ respectively. Correlate this scale with the Centigrade scale. The reading of 0°ρ on the Centigrade scale is: a)0°C b)50°C c)100°C d)150°C

In a new temperature scale say °ρ, the boiling and freezing points of water at one atmosphere are 100°ρ and 300°ρ respectively. Correlate this scale with the Centigrade scale. The reading of 0°ρ on the Centigrade scale is: ...Read more