A container filled with 45 kg of liquid water at 95°C is placed in a 90-m3 room that is initially at 12°C. Thermal equilibrium is established after a while as a result of heat transfer between the water and the air in the room. Using constant specific heats, determine the entropy generation. Assume the room is well sealed and heavily insulated.

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Q: R-134a is initially at 600 kPa and 25°C. It undergoes a process during which the entropy is kept…

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Q: X1 P A well-insulated tank contains a liquid-vapor mixture of water with quality of 0.7 at 250 kPa.…

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Q: 2. What is the entropy change of the water, the oven and the universe (in kJ/K) when 1 kg of liquid…

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Q: Is it possible for the entropy change of a closed system to be zero during an irreversible process?

A: The entropy change for irreversible process for closed system is given byHere, term  comes due to…

Q: (2) A well-insulated 114 m room initially at 4°C and 90 kPa is heated by the radiator of a steam…

A: Given:-              v = 1143T = 4° CP = 90 kPa100 kPa after 146 mm      40 L From the steam table…

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A: Introduction During the…

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Q: Through an isentropic process, a piston compresses 2 kg of an ideal gas at 150 kPa and 35C in a…

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Q: Water at 95°C having mass of 45 kg is filled in a container and is placed in well-insulated room.…

A: Data given-  Tw  = 95°C = 368 K  mw = 45 kg  Vair = 90 m3  Tair = 12°C = 285 K  Cw = 4.18 kJ/kg  CP…

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Q: Heat flows through a wall of a house at a steady-state on a day when the temperature of the outdoor…

A: From the given data,the question asked for total entropy generation. For that take inside and…

Q: Air contained in a rigid volume of 0.5 m³ and initially at 400 kPa and 57°C receives 200 kJ of work…

A: Given data:

Q: (2) A well-insulated 114 m room initially at 4°C and 90 kPa is heated by the radiator of a steam…

A: Let m= mass of air  cv=specific heat of air at constant volume=0.718KJ/kgK T=Temp. of air before…

Q: Required information Problem 07.088 - DEPENDENT MULTI-PART PROBLEM - ASSIGN ALL PARTS NOTE: This is…

A: Given Data- P1=90KPa T1=20'C P2=450KPa R=0.287 KJ/kgK We have find entropy change

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Q: An ideal gas in a piston-cylinder device is compressed from 100 kPa and 47C to 500 kPa with a Pv 1.4…

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Q: A cylinder and piston arrangement contains saturated water vapor at 110 C . The vapor is compressed…

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Q: Consider the system shown in the figure. When the pins fall away, the gas expands against a constant…

A: Number of moles of the gas, n=10  Initial pressure Pi= 5atm External Pressure Pext = 1 atm T = 300 K…

Q: Seven kilograms of air is contained in a constant volume tank at 327 degrees C and 120 kPa, then is…

A: Calculate the entropy change of the air.

Q: A 40-kg aluminum block initially at 227°C is brought into contact with a 40-kg block of iron at 50°C…

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Q: Give an example of Energy and entropy balances for a system.

A: Let's first understand entropy and energy. Entropy is basically defined as the ratio of the…

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Q: 1 kg of AIR at P = 100 kPa is contained in a RIGID TANK made of IRON of mass 0.5 kg. Initially, the…

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Q: Please do not use the answers to calculate the answer, Find the answer the normal way.

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Q: Consider a closed, isolated system that consists of two substances 1 and 2 that both have constant…

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Q: EXERCISE 1 Air contained in a piston-cylinder device is expanded isothermally at 150°C from 0.5 MPa…

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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: Under what circumstances can the entropy of a system decrease for a spontaneous process?

A: Whenever there is some heat rejection from the system the entropy of the system decreases.

Q: piston-cylinder

A: OPTION b) 8.712 Btu/R

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Q: Describe the equilibrium condition in terms of the entropy changes of a system and its surroundings.…

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Q: Problem 2 An insulated piston-cylinder device contains 0.2 m³ of saturated refrigerant R-134a vapor…

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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.