choose the best answer: A- An ideal gas enters an adiabatic nozzle at 10 m/s and...

choose the best answer:

A- An ideal gas enters an adiabatic nozzle at 10 m/s and exits at 300 m/s. If the incoming specific enthalpy of the gas is 2,111 kJ/kg, what is the exiting specific enthalpy of the gas in kJ/kg?

Choices: 1: 2021.1 Kj/Kg , 2: 2200.9 kj/Kg , 3: 92011 Kj/Kg , -2021.2 kj/Kg.

B- A material with a specific heat, Cp, of 5 kJ/kg-K passes through an insulated turbine at 4 kg/s. The incoming temperature of the material is 100°C and the exiting temperature is 50°C. Determine the shaft work in kW.

Choices: 1: 1000 KW , 2: -1000 KW , 3: 250 KW , 4: -250 KW.

C- Which of the following statements about a well-insulated heat exchanger is false (ignoring kinetic and potential energy changes):

Choices: 1: heat is exchanged between the system and the surroundings , 2: the 2 materials do not physically mix , 3: energy is exchanged between the materials , 4: the sum of the enthalpy changes equals zero.

D- An open vat contains 1 kg of boiling ammonia at 1 bar. Calculate the time (in seconds) it takes for the vat to empty if the heat is added at a rate of 100 kW?

Answer: ?

Solutions

Expert Solution

As you mentioned in que that choose best option it means I have to answers only McQ type questions so I had solved first three McQ with explaination so please rate me thumbs up for the solution.

samet mamat answered 6 months ago

Next > < Previous

Related Solutions

Air enters a nozzle steadily at 280 kPa and 77°C with a velocity of 70 m/s...

Air enters a nozzle steadily at 280 kPa and 77°C with a velocity of 70 m/s and exits at 85 kPa and 320 m/s. The heat losses from the nozzle to the surrounding medium at 20°C are estimated to be 3.2 kJ/kg. The table for the ideal-gas properties of air is given below. Determine the exit temperature. (Round the final answer to one decimal). The exit temperature is ______K Determine the total entropy change for this process. (Round the final...

Prove that the adiabatic process of an ideal gas in a simple compressible closed system is...

Prove that the adiabatic process of an ideal gas in a simple compressible closed system is the polytropic process of n=k ( where k is the specific heat rate) by using the thermodynamic first law. Please answer quickly will rate positive thank u

Refrigerant 134a enters a well-insulated nozzle at 14 bar, 60°C, with a velocity of 37 m/s...

Refrigerant 134a enters a well-insulated nozzle at 14 bar, 60°C, with a velocity of 37 m/s and exits at 1.2 bar with a velocity of 460 m/s. For steady-state operation, and neglecting potential energy effects, determine the exit temperature, in °C.

For the ideal gas law to be most applicable, it is best for the gas to...

For the ideal gas law to be most applicable, it is best for the gas to exist at?

Argon gas enters an adiabatic compressor at 16.0 psia with 99 F with a velocity of...

Argon gas enters an adiabatic compressor at 16.0 psia with 99 F with a velocity of 49.9 ft/s. It exits at 225 psia and 209.5 ft/s. If the isentropic efficiency of the compressor is 83.1%, determine: a) the exit temperature (R) of the argon b) the work input to the compressor (Btu/lbm)

The pressure of a monatomic ideal gas doubles during an adiabatic compression. What is the ratio...

The pressure of a monatomic ideal gas doubles during an adiabatic compression. What is the ratio of the final volume to the initial volume (Vf/Vi)?

What is the difference between isothermal and adiabatic? 300 cm3 of an ideal diatomic gas at...

What is the difference between isothermal and adiabatic? 300 cm3 of an ideal diatomic gas at a pressure of 1 atmosphere and a temperature of 300 K (i.e. room temperature) is contained by a cylinder with a piston top. A camshaft turns and drives the piston further into the cylinder, reducing the volume to 100 cm3 . (a) What is the final pressure if this compression takes place isothermally? What is the final pressure and temperature if the compression takes...

N atoms of an ideal gas are contained in a cylinder with insulating (adiabatic) walls, closed...

N atoms of an ideal gas are contained in a cylinder with insulating (adiabatic) walls, closed at one end by a piston.The initial volume is Vi and the initial temperature is Ti. Find the change in temperature, pressure and entropy that would occur if the volume were suddenly increased to Vf by withdrawing the piston (Vf > Vi).

N atoms of an ideal gas are contained in a cylinder with insulating (adiabatic) walls, closed...

N atoms of an ideal gas are contained in a cylinder with insulating (adiabatic) walls, closed at one end by a piston.The initial volume is Vi and the initial temperature is Ti . Find the change in temperature, pressure and entropy that would occur if the volume were suddenly increased to Vf by withdrawing the piston (Vf > Vi).

A gas with cp = 0.950 kJ/kg-K enters an insulated nozzle at 30oC and a velocity...

A gas with cp = 0.950 kJ/kg-K enters an insulated nozzle at 30oC and a velocity of 8 m/s. The gas exits at a velocity of 100 m/s. Assuming constant specific heats and ideal gas behavior, what is the exit temperature of the gas?

Subjects