One kg de air initially at 300 K and 100 kPa undergoes a quasi-equilibrium constant-pressure process...

One kg de air initially at 300 K and 100 kPa undergoes a quasi-equilibrium constant-pressure process in a piston-cylinder assembly. If the final temperature is 450 K, determine the work and heat interactions and the change in the enthalpy.

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samet mamat answered 1 year ago

Air is at 100 kPa and 150°C, and undergoes a constant pressure process. The final temperature...

Air is at 100 kPa and 150°C, and undergoes a constant pressure process. The final temperature of the air is 1000°C. a) Compute the specific volume ratio. b) Compute the boundary work (kJ/kg) c) Compute the change in specific internal energy by: 1. Using the tables. 2. Integrating the polynomial (cp) 3. Assuming constant specific heat. d) Repeat c for specific enthalpy e) Compute the heat

Air enters the compressor at 100 kPa, 300 K and is compressed to 1000 kPa. The...

Air enters the compressor at 100 kPa, 300 K and is compressed to 1000 kPa. The temperature at the inlet to the first turbine stage is 1400 K. The expansion takes place isentropically in two stages, with reheat to 1400 K between the stages at a constant pressure of 300 kPa. A regenerator having an effectiveness of 100% is also incorporated into the cycle. The turbine and the compressor each have am isentropic efficiency of 80%. Determine the following: (a.)...

4.65 A system consisting of 5 kg of air is initially at 300 kPa and 20...

4.65 A system consisting of 5 kg of air is initially at 300 kPa and 20 degrees C. Determine the heat transfer necessary to (a) increase the volume by a factor of two at constant pressure, (b) increase the pressure by a factor of two at constant volume, (c) increase the pressure by a factor of two at constant temperature, and (d) increase the absolute temperature by a factor of 2 at constant pressure.

A 1.0 m3 tank, initially filled with 103. kPa, 300. K air, is connected to a...

A 1.0 m3 tank, initially filled with 103. kPa, 300. K air, is connected to a source of air at 1,500. kPa, 300. K. The tank slowly fills until it is at the same pressure. If the temperature is maintained at 300. K throughout this transient process, what is the total heat transfer required? (You can assume air is an ideal gas.)

Air enters the compressor of an ideal air-standard Brayton cycle at 100 kPa, 300 K, with...

Air enters the compressor of an ideal air-standard Brayton cycle at 100 kPa, 300 K, with a volumetric flow rate of 5 m3/s. The turbine inlet temperature is 1800 K. For a compressor pressure ratio of 9, determine: (a) the percent thermal efficiency of the cycle. (b) the back work ratio. (c) the net power developed, in kW.

A mass of 0.07 kg of air at a temperature of 30°C and pressure 100 kPa...

A mass of 0.07 kg of air at a temperature of 30°C and pressure 100 kPa is compressed to a pressure of 600 kPa, according to the law: (i.e. Polytropic process, n=1.3). Determine: i.The final volume ii.The final temperature iii.The work transfer iv.The change in internal energy v.The heat transfer

Air enters the compressor of an ideal cold air-standard Brayton cycle at 100 kPa, 300 K,...

Air enters the compressor of an ideal cold air-standard Brayton cycle at 100 kPa, 300 K, with a mass flow rate of 6 kg/s. The compressor pressure ratio is 10, and the turbine inlet temperature is 1400 K. For k = 1.4 and Cp = 1.005 kJ/kg, calculate: (a) the percent thermal efficiency of the cycle. (b) the back work ratio. (c) the net power developed, in kW

9.43 An ideal air-standard state with compressor inlet conditions of 300 K and 100 kPa and...

9.43 An ideal air-standard state with compressor inlet conditions of 300 K and 100 kPa and a fixed turbine inlet temperature of 1700 K. For the cycle, Plot the net work developed per unit mass flowing, in kJ/kg, and the thermal efficiency, each versus compressor pressure ratio ranging from 2 to 50. I need the IT Thermodynamics software code, or at least I need to know how to set the code up. Also, please note that this is an air-standard...

Air of 0.5 kg mass is compressed in a piston-cylinder device from 300 K, 120 kPa...

Air of 0.5 kg mass is compressed in a piston-cylinder device from 300 K, 120 kPa to 500K, 940 kPa. (a) Determine the entropy change in kJ/K using (i) approximate analysis and (ii) exact analysis. (b) Determine the direction of heat transfer (into the device or out of the device).

The vapour pressure of pure liquid A at 300 K is 76.7 kPa and that of...

The vapour pressure of pure liquid A at 300 K is 76.7 kPa and that of pure liquid B is 52.0 kPa. Assume that A and B form ideal solutions and gaseous mixtures. Consider the equilibrium composition of an ideal solution of A and B in which the total pressure above the solution is 70.5 kPa. (a) Determine the mole fractions of A and B in the liquid solution and in the vapour phase above the solution. (b) If the actual...

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