A piston-cylinder device contains 13 kg of refrigerant-134a at 750 kPa and 70 ∘C. The refrigerant is then cooled at constant pressure until it comes to thermal equilibrium with the atmosphere, which is at 20 ∘C. (a). Determine the amount of entropy transfer (S) into the atmosphere. (b). Determine the change of entropy (ΔS) of the refrigerant. (c). Determine the entropy generated (Sgen,univ) in the system's universe.

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: A piston cylinder device contains a liquid-vapor mixture of water at 500K. During a constant…

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Q: Q1) Can the entropy of a closed system decrease during a reversible process ? Write down what needs…

A: Entropy Entropy is the measure of disorder in the system i.e. more the disorder entropy increases.…

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…

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Q: 2 kg of air contained in a piston-cylinder assembly undergoes a process from the initial state of ?1…

A:

Q: 2. Steam at a temperature of 300°C has a specific volume of 0.09765 m³/kg. Determine the pressure,…

A: Given       Temperature, T = 300oC  Specific volume, v = 0.09765 m3/kg Find  Pressure, P Specific…

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.

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Q: 1. 1 kg of propane contained within a piston-cylinder assembly undergoes a process from an initial…

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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: 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: Calculate the change of entropy (a) of a bath containing water, initially at 20 ◦ C, when it is…

A:

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: 6. Steam flowing in a pipe at 18 bar is reduced to a pressure of 1 bar and 125 °C through an orifice…

A: Introduction: Orifice plates are one of the most widely used devices for measuring and controlling…

Q: A small rigid storage tank with a volume of 0.12 m3 contains 0.9 kg of argon at 40°C. Heat transfer…

A: STEP 1: The volume of the tank is V = 0.12 m3. The mass of the argon is m = 0.9 kg. The initial…

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- A rigid cylinder containing 0.4 m³ of nitrogen at 1 bar and 300 K is heated rever until the…

A: Since the container is rigid, the heat addition is done at constant volume. The mass of the nitrogen…

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Q: Superheated steam, 0.270 kg,0.270 kg, at a temperature of 250 ∘C250 ∘C and an unknown pressure is…

A: Write the given data. m=0.270 kgT1=T2=250 °CQloss=105 kJTsurr=27 °C

Q: piston-cylinder

A: OPTION b) 8.712 Btu/R

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A: Given data dQ = heat transfer = 960kJ Tair = 300K Twater = 400K We need to find => Total entropy…

Q: Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -12…

A: Temperature T1 = -12 C Rate = 18 kgm/min Pressure P1 = 5 bar Entropy change = 0.4842 KJ/K-min

Q: When two systems are in contact, the entropy transfer from the warmer system is equal to the entropy…

A: Yes, the above statement is absolutely true. Entropy is a thermodynamic quantity that derives its…

Q: Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -12…

A: The saturated properties of R-134a at -12oC is h1=243.30 kJ/kg The entropy at vapor state is…

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Q: A rigid vessel of 0.075 m3 volume contains an ideal gas, CV = 5/2 R at 540 K and 1 bar. If heat in…

A: given data; ⇒volume of rigid vessel (V)=0.075m3⇒Cv=52R⇒temperature (T1)=540K⇒pressure(P)=1bar⇒amount…

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.