The entropy production or for nitrogen, an ideal gas, is 0.360 kJ/kg K when it is throttled from an initial pressure of 400 kPa. Determine (a) the final pressure, in kilopascals, to which the gas is throttled and (b) the ratio of the inlet to outlet area if the inlet and exit velocities are identical

Q: An iron horseshoe of mass 1.47 kg is taken from a furnace at 660 ◦C and dropped into 1.83 kg of…

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Q: Air is compressed steadily by a reversible compressor from an inlet state of 100 kPa and 300 K to an…

A: The inlet pressure of the air at the compressor is P1=100 kPa The exit pressure of the air at the…

Q: Determine the change in the entropy of air,in kJ/kg-K, as it undergoes a change of state from 100…

A: Given : The initial pressure is .The initial temperature is .The final pressure is .The final…

Q: - Exercise D02: A cylinder-piston arrangement contains m = 1 kg of water, initially in the saturated…

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Q: Dry saturated steam at p1 = 3.5 MPa is contained in a cylinder-piston arrangement. It is brought…

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Q: Starting from the 1st law of thermodynamics, prove that the change in the entropy of an ideal gas…

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Q: Steam flows isentropically through a nozzle from 1500 kPa, 288 to 960 kPa. For 454 g/s determine (a)…

A: Given Data The initial pressure of the steam is: P1=1500 kPa The initial temperature is: T1=288°C…

Q: Determine change in specific entropy of the ideal gas from state 1 to state 2 in kJ/kg K

A: Given, State1:  T1=300 K      P1=100 kPAState 2:  T2=600 K      P2=500 kPAcp=1 kJ/kg-kR=cp-cvcv=0.7…

Q: Steam flows isentropically through a nozzle from 1500 kPa, 288 to 960 kPa. For 454 g/s determine…

A: Given data as per question Inlet pressure =1500 kpa Inlet temperature =2880 c Exit pressure =900 kpa…

Q: Water in a closed rigid tank, initially at 689 kPa, 427 oC is cooled to a final state of 138 kPa.…

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Q: An iron horseshoe of mass 1.47 kg is taken from a furnace at 660 ◦C and dropped into 1.83 kg of…

A: Given:  m1=miron=1.47 kgT1=660°Cm2=mwater=1.83 kgT2=8.5°Cc2=cw=4186 J/kg.Kc1=ciron=448 J/kg.K

Q: A piston-cylinder device contains 13 kg of refrigerant-134a at 750 kPa and 70 ∘C. The refrigerant is…

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Entropy

In physics, entropy means the amount of disorder or the degree of randomness associated with a thermodynamic system. The system is not self-organized when the entropy of the system is high. For instance, when a system is at an elevated temperature, its molecules are in random motion, vibrating and colliding with each other. During this scenario, the probability of finding a molecule at a particular place twice, is low. Under this circumstance, the system can be said to be in a high entropy.