During a heat transfer process, the entropy change of incompressible substances, such as liquid water, can be determined from ΔS = mcavg ln(T2/T1). Show that for thermal energy reservoirs, such as large lakes, this relation reduces to ΔS = Q/T.

Q: 1kg of air is allowed to .19 expand reversibly in a cylinder behind a piston in such way the…

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Q: A 5 L of saturated liquid water at a constant pressure of 150 kPa is contain in an insulated…

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Q: Q// One Kg of mass of air at a pressure of 300 KPa, and specific volume of 0.2 m/kg expands…

A: Answer: (a) For p = constant process, W = 60 kJ/kg , Q = 210.10508 kJ/kg. (b) For pv2 = constant…

Q: Using the appropiate table change in specific specific ent P1 = State 1 I sobanc Cooling 1 State 2…

A: Given: State 1 of water - Isobaric cooling  State 2 of water - saturated liquid  P1=5 MPa, T1=360°C

Q: Arrange the given systems in order from highest entropy to lowest entropy. liquid salt water at…

A: Since,entropy is defined as the measure of molecular disorder.Molecular disorder increases with…

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: Insulated water tank 2. Water (0.12m3) 3. 4. 5. 6. COPPER A 50-kg copper block initially at 80°C is…

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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: Argon initially at -77 °C and 9720 kPa is contained in 1.2 m3 rigid tank. The tank is heated until…

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Q: Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be…

A: Write the given data. m=27 lbmvi=50 ft3/lbmTi=60 °F=288.70 Kvf=20 ft3/lbmTf=240 °F=388.70 KR=0.4961…

Q: Determine the entropy for these states. R-134a, T = 25°C, v = 0.01 m3/kg

A: Given Data: The temperature of R-134a is, T=25°C. The specific volume of R-134a is, v=0.01 m3/kg.

Q: A 2.18 kg of air at 22.89 C underwent an isobaric process wherein its initial volume of 1.64 m3 was…

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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…

Q: (a) Deduce clausius inequality and interpret it.

A: “Since you have posted multiple questions with multiple sub parts,we will provide the solution only…

Q: As a result Of heat transfer to the surroundings durİng a constant-pressure process, 0.375 kg Of…

A: Given that,Process 1-2: Constant pressure heat rejection (Internally reversible)Mass = m = 0.375…

Q: When 1.5 kg of water at 14.1 ∘C is mixed with 3.0 kg of water at 39.9 ∘C in a well-insulated…

A: Given Data: Mass m1=1.5 kg Temperature T1=14.1°C=14.1+273=287.1 K Mass m2=3 kg Temperature…

Q: A bucket contains 20 kg of water at 120 •C, and 8 kg of water at 240 •C and the two fluids are…

A: Given: Mass of water in partition 1 (m1)=20kgTemperature of water in partition 1 (T1)=120°C or…

Q: Q. ASSERTION (A) : There is entropy transfer both in heat transfer and(work transfer Reason (R) Both…

A: Entropy can transfer to or from a system in two ways:  With the heat transfer from or to the system…

Q: explain in a structured way about the relationship between gibs free energy, enthalpy and entropy at…

A: Let's explore the relationship between these three thermodynamic quantities in a structured…

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 2.21 kg of air at 22.46 C underwent an isobaric process wherein its initial volume of 1.73 m3 was…

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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…

Q: a) A piston-cylinder device contains a working fluid which undergoes an irreversible and…

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Q: Write down the equation for macroscopic entropy change ∆S in a process taking a system between…

A: The Entropy is nothing but the disorderliness between the molecules of the system. The relation…

Q: A liquid R-134a bottle has an internal volume of 0.0018 m^3 initially, it contains 0.88 kg of R-134a…

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Q: Q.8 During the quenching process, a hot iron of mass 25kg and at a temperature of 450°c is dropped…

A: Data given -  mI = 25 kg  TI = 450°C = 723 K  CI = 0.5 kJ/kg K  moil = 180 kg  Toil = 20°C = 293 K…

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: 0.03 m3 of nitrogen having molecular weight 28 contained in a cylinder behind a piston is initially…

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Q: entropy (in kJ/kgK)

A: Given; Total volume,(V)=0.05 m3 Mass of the liquid present ,m=8kgProperty data for saturated steam…

Q: Six moles of an ideal gas expand isothermally and reversibly from a volume 0.001 m3 to 0.01 m3 at 27…

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Q: A 2.18 kg of air at 22.89 C underwent an isobaric process wherein its initial volume of 1.64 m3 was…

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Q: change in entropy S2 - S1 (in j/kg-K) is

A: Given data; One kg of air;  R= 287 j/kg-K State 1;   T1=200C    v1=0.9 m3  State 2;     T2=200C…

Q: Two pounds of a certain gas(Cv = 0.17 BTUlb−R , R = 50.2 ft−lbflb−R) at 20 psia and 80 deg F are…

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Q: Define the mechanisms of entropy transfer for a general system.

A: There are basically two forms in which entropy is transferred namely through heat transfer &…

Q: The free expansion of an ideal gas is an adiabatic process andso no heat is transferred. No work is…

A: Given: Free expansion process To determine: Why equation Q/T cant be apply for this process

Q: 18. 1m3 of air is heated at constant pressure from 15 to 300C, and is then cooled at constant volume…

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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.