A high temperature reservoir losing heat and hence entropy is a reversible process. A low temperature reservoir gaining a certain amount of heat and hence entropy is a reversible process. But a high temperature reservoir losing heat to a low temperature reservoir is irreversible. Why?

Q: If I know that the change in entropy of a system where heat was added is 30 J/K, and that the…

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Q: When an aluminum bar is connected between a hot reservoir at 620 K and a cold reservoir at 358 K,…

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Q: When an aluminum bar is temporarily connected between a hot reservoir at 630 K and a cold reservoir…

A: Given that: Heat transferred dQ = 2.60kJ  =2600J The temperature of the hot reservoir  Th= 630 K The…

Q: A heat source generates heat at a rate of 55.0 W (1 W=1 J/s)55.0 W (1 W=1 J/s). How much entropy…

A: Given;-  A heat source generates heat at a rate of  P = 55 W = 55 J/sec  The surrounding temperature…

Q: Wood burns at a temperature of approximately 500. °C. One cord of seasoned (dry) firewood releases…

A: This problem can be solved using the formula for change in entropy in a process.

Q: On a winter day, a certain house loses 1.12 x 108 J of heat to the outside. What is the total change…

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Q: A container with a total volume of 2.77 L is divided in half so that there are two compartments of…

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Q: We have n moles of an ideal gas that expands reversibly through an isothermal process, when doubling…

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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: A container with 41 g of a certain liquid (c = 4171 J/kg · °C, Lv=2224 kJ/kg) at 22 °C is heated up…

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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: On a winter day, a certain house loses 5.00 × 108 J of heat to the outside (about 500,000 Btu). What…

A: On a winter day, a certain house loses 5.00 × 108 J of heat to the outside (about 500,000 Btu). What…

Q: A freezer is used to freeze 1.5 L of water completely into ice. The water and the freezer remain at…

A: The expression for change in entropy is, ∆S=QT…

Q: There is a 300-g covered aluminum cup at 25°F being filled with 190-g of water at 90°C. Equilibrium…

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Q: 840 g of water (Cp = 4.186 J/g-K) is heated to 94 ⁰C at constant pressure. The resulting change in…

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Q: Suppose we place 47 g of ice at 273 K in contact with a heat reservoir at 309K. Heat energy…

A: Given: The mass of the ice is 47 g. The initial temperature of the ice is 273 K. The temperature of…

Q: Explain how water’s entropy can decrease when it freezes without violating the second law of…

A: Total energy is always given as the sum of energy of the system and energy of the surroundings.

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

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Q: Which of the following statement is true? O The total entropy of the universe decreases when a…

A: Let's check each option one by one 1. The total entropy of the universe decreases when a reversible…

Q: One container holds 0.10 kg of water at 80 C and is warmed to 100 C by heating from contact with the…

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Q: A freezer is used to freeze 5.0 L of water completely into ice. The water and the freezer remain at…

A: The energy transferred from the water by heat can be obtained asSubstituting the values and solving…

Q: A boulder with a mass of 75.0 kg, starting from rest, falls a distance of 20.0 m into a shallow…

A: Mass M = 75.0 kg Temperature T = 301 k Distance h= 20.0 m

Q: On a winter day, a certain house loses 5.20 x 10° J of heat from the warm 25°C interior to the cold…

A: As per Bartleby rules, we are to answer the first three sub-parts of a question when specific…

Q: The temperature at the surface of the Sun is approximately 5,100 K, and the temperature at the…

A: temperature of surface of sun(TS)=5100 K Temperature of surface of earth(TE)=291K Energy(Q)=4.50 X…

Q: You have two heat sinks. One is held at a constant temperature at 20 degrees C, and the other is at…

A: Given, Temperature of first heat sink T1 = 20° C = 20 + 273 K = 293 K Temperature of second heat…

Q: On a cold day, 17400 J of heat leaks out of a house. The inside temperature is 24.0° C, and the…

A: Given Data: The amount of heat leaks is, Q=17400 J The inside temperature of the house is, Th=24°C…

Q: A puddle containing 1.10 kg of water at 0°C freezes on a cold night, becoming ice at 0°C. What was…

A: Given that The mass of the water 1.10Kg covert into gram                         m = 1100g Latent…

Q: What is the change in entropy of 0.040 moles of ideal gas with y = 7/5 when it is decompressed…

A: Given Change in entropy (n) = 0.040 moles Ideal gas γ                = 7/5 Pressure P1…

Q: When an aluminum bar is connected between a hot reservoir at 630 K and a cold reservoir at 298 K,…

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Q: 1. One mole of an ideal gas expands isothermally at T=20°C from 1.2 m³ to 2.2 m³. The gas constant…

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Q: A gas expands adiabatically and reversibly. What is its change in entropy?

A: Entropy The entropy is the measure of the thermal energy present in the system per unit temperature…

Q: 5. If the change in system entropy for a given process is -8.3 J/(mole.K): (A) What can be known…

A: Given, change in system entropy for a given process is -8.3 J/(mole. K) ∆Ssys = -8.3 Jmol K We know…

Q: A phase change, such as melting or freezing, occurs at a fixed temperature. What happens to the…

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Q: A rod made of copper with a mass of 0.90 kg is heated to 850°C, then dropped into 5.00 kg of water…

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Q: What is the change in entropy in an adiabatic process? Does this imply that adiabatic processes are…

A: The change in entropy,

Q: A hollow drinking straw is placed in a glass of warm water.  Suppose that some of the water started…

A: Thermodynamics : It denotes with the study of energy, the transformation of energy between various…

Q: "In heating 250 cubic cm of water, you place an electric element in the cup. As the water…

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