Do all exothermic phase changes have a negative value forthe entropy change of the system? (a) Yes, because the heattransferred from the system has a negative sign. (b) Yes, because the temperature decreases during the phase transition.(c) No, because the entropy change depends on the signof the heat transferred to or from the system. (d) No, becausethe heat transferred to the system has a positive sign.(e) More than one of the previous answers is correct.

Q: 7-32 A 0.5-m³ rigid tank contains refrigerant-134a initially at 200 kPa and 40 percent quality. Heat…

A: Thus the entropy change in refrigerant is 3.875kJ/kg⋅K

Q: An ice cube (mass 30 g) at 0°C is left sitting on the kitchen table,  where it gradually melts. The…

A: Suppose ΔQ is the amount of heat required during the phase transition of ice ΔQ=mLSo, change in…

Q: Calculate the change in entropy of the universe if 0.3 kg of water at 70°C is mixed with 0.2 kg of…

A: Given: Mass of water 1,m1=0.3kgTemperature,T1=700C=343KMass of water…

Q: What is the decrease in entropy (in J/K) of 26.5 g of water that condenses on a bathroom mirror at a…

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Q: A real (non-Carnot) heat engine, operating between heat reservoirs at temperatures of 510 K and 270…

A: Given-  T1 = 510 K T2 = 270 K W = 2.4 kJ Q= 37.6 kJ Part(a) The thermal efficiency of a real heat…

Q: When 1.60×105J of heat transfer occurs into a meat pie initially at 20.0º C , its entropy increases…

A: Given quantities: heat transfer (dQ) = 1.60×105 J increase in entropy (dS) = 480 J/K initial…

Q: If you pour a cup of hot water into a cup of cold water, you wind up with two cups of lukewarm…

A: This process is irreversible process. After mixing we have two cups of lukewarm water which has an…

Q: 1. (a) In reaching equilibrium, how much heat transfer occurs from 1.4 kg of water at 40°C when it…

A:

Q: (a) What is the change in entropy if you start with 100 coins in the 45 heads and 55 tails…

A: Number of microstates for the given configuration

Q: When an aluminum bar is connected between a hot reservoir at 800 K and a cold reservoir at 288 K,…

A: Given that,The temperature of hot reservoir, TH=800 KTemperature of cold reservoir,Tc=288KHeat…

Q: Are the entropy changes of the systems in the following processes positive or negative? (a) water…

A: The entropy change(dS) of a system is defined as follows: If the system has a temperature T and a…

Q: (a) Explain how heat transfer, work done, and internal energy change is related in any thermodynamic…

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Q: An 8.0 g ice cube at -10°C is put into a Thermos flask containing 100 cm³ of water at 20°C. (a) What…

A: Since you have posted multiple questions, we will provide the solution only to the first three…

Q: One mole of an ideal gas doubles its volume in a reversible isothermal expansion. (a) What is the…

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Q: Does the entropy of a system always increase with an increase in temperature?

A: Not always. Entropy of system  increases when heat is transferred. And sometimes temperature can be…

Q: A piston/cylinder contains air assumed to be an ideal gas at 800 kPa and 300 K. The gas undergoes…

A: a) According to first law of thermodynamics dQ = dU + PdV  Since the process is isothermal  dU = 0…

Q: Suppose this engine is not reversible, and that only 457 J of work is done when 1050 J of heat is…

A:

Q: A solid substance that has a latent heat of fusion 28.1 kJ/kg melts at a temperature 330◦C.Calculate…

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Q: Explain why a building made of bricks has smaller entropy than the same bricks in a disorganized…

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Q: How much energy must be transferred as heat for a reversible isothermal expansion of an ideal gas at…

A:

Q: The surface of the Sun is approximately at = 700 K, and the temperature of the Earth’s surface is…

A:

Q: A) 20 J of heat is transferred from a hotter reservoir to a colder reservoir. Calculate ΔStot (J…

A:

Q: Suppose that there are two very large reservoirs of water, one at a temperature of 85.0 °C and one…

A: Temperature of first reservoir (T) = 85oC temperature of second reservoir (T') = 19oC Heat…

Q: Suppose we have 3.50 kg of water at a temperature of 0 degre celsius. We put the water in a freezer,…

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Q: Entropy is often called “time’s arrow” because it tells usin which direction natural processes…

A: Concept: A capacity to do work is called energy and it may exist in potential, kinetic, thermal,…

Q: Which statement is not the second law of thermodynamics? -For a natural process, the entropy…

A:

Q: Suppose that 260 J is conducted from a constant-temperature reservoir at 400 K to one at (a) 100 K,…

A: The change in entropy for the reservoir at higher temperature is given by, a)

Q: Consider the following quantities:  Heat Energy, Work, Change in Internal Energy and Change in…

A: Given quantities are : Heat Energy , Work , Change in internal Energy And change in entropy

Q: When an aluminum bar is connected between a hot reservoir at 800 K and a cold reservoir at 288 K,…

A: Given data,The temperature of hot reservoir, TH=800 KTemperature of cold reservoir,Tc=288KHeat…

Q: Calculate the change in entropy when a 0.125-kg chunk of ice melts at 0◦C. Assume the melting occurs…

A:

Q: O Entropy O Synergy

A: The word synergy mean is working together. This mean that when two or more agents or forces act then…