An object at 400 K absorbs 25.0 kJ of heat from the surroundings. What is the change in entropy ΔS of the object? Assume that the temperature of the object does not change appreciably in the process.

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Q: Calculate the entropy change of the system when a system expands at a constant temperature of 311 K…

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Q: The concentration of glucose inside a cell is 0.13 mM. Outside the cell the concentration of glucose…

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Q: Explain how the internal energy and entropy of a system composed of two levels vary with…

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Q: Consider a process in which 250 kJ of energy is transferred reversibly and isothermally as heat to a…

A: Entropy is the measure of degree of randomness. The change in entropy can be measured as follows:

Q: Given the following values for the changes in enthalpy (∆H) and entropy (∆S), which of the following…

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Q: Calculate the change in molar entropy when hydrogen gas is heated from 20°C to 30°C at constant…

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Q: For the isothermal expansion of a gas into a vacuum,ΔE = 0, q = 0, and w = 0. (a) Is this a…

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Q: Explain how the entropy of a system is related to the number ofpossible microstates?

A: To find: The relation between the entropy and number of possible microstates

Q: For a reaction, ΔHrxn = -107 kJ and ΔSrxn = 285 J>K. At what temperature is the change in entropy…

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Q: What is the entropy when a system goes from 4 microstates to 5 microstates?

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Q: Consider the general reaction at 29 degrees C: 2 A + 1 B → 3 C + 3 D ΔH reaction = -2,079 kJ…

A: The change in entropy of a system at a constant temperature and constant pressure is given as:…

Q: What is the significance of the change in Gibbs free energy (ΔG) for a reaction?

A: In thermodynamics free energy or Gibbs free energy is the energy that is used to express the total…

Q: Which substance would have the greatest standard molar entropy? N2(g) NO2(g)

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Q: Consider the reaction: NH4Cl(aq)NH3(g) + HCl(aq) Using standard thermodynamic data at 298K,…

A: Interpretation -  To determine the  entropy change for the surroundings when 1.76 moles of NH4Cl(aq)…

Q: Under what circumstances does entropy of a system decrease for a spontaneous process

A: For any  spontaneous process, the value of Gibbs free energy change i.e ΔG should be -ve And since…

Q: Create a system that shows the third law of thermodynamics and how it relates to the concept of…

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Q: How does the molar entropy of a substance change with increasing temperature?

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Q: Consider the general reaction at 26 degrees C: 2 A + 1 B → 3 C + 2 D ΔH reaction = -1,899 kJ…

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Q: What is the entropy change when 315 J of energy is reversibly transferred to a sample of water at…

A: Entropy change of a system for reversible process is given by  where ΔS = entropy change  Q = heat…

Q: Determine the entropy change for the combustion of gaseous propane, C3Hg, under the standard…

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Q: How many microstates are present in a system with an entropy of zero?

A: The entropy (S) and microstates(W) are related by formula : S = kB ln(W)  Here , kB = Boltzmann…

Q: Calculate the change in entropy for 17 moles of gold if the temperature changes reversibly from…

A: Entropy of a system can be defined as the degree of randomness in that system. Joule per Kelvin is…

Q: How does the standard entropy of a substance depend on its molar mass? On its molecular complexity?

A: Entropy is a thermodynamic property, which is the measure of randomness of a system. Entropy of the…

Q: Consider a process in which the entropy of a system increases by 105 J K−1 and the entropy of the…

A: Given information,    The entropy of a system increases by 105 J K−1    The entropy of the…

Q: 1. The heat capacity at 1 atm. pressure of solid magnesium in the temperature range from 0 °C to 560…

A: The unit of temperature is not mentioned therefore i am using kelvin. Data given: T2 =800K, T1…

Q: During a hypothetical process, the entropy of a system increases by 105 J K-1 while the entropy of…

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Q: What is the significance of the change in Gibbs free energy (∆G)for a reaction?

A: The significance of the change in Gibbs free energy (∆G)for a reaction: (i) If ∆G for a reaction…

Q: Consider a process in which the entropy of a system increases by 125 J K−1 and the entropy of the…

A: Entropy change of the universe is the summation of entropy change of the system and entropy change…

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

A: Entropy measures the degree of randomness in the system. When a substance changes its phase solid to…

Q: Does the entropy of the surroundings increase for spontaneous processes?

A: The entropy is a measure of randomness of a system. In a spontaneous process, the entropy of the…

Q: Explain why changes in both enthalpy and entropy determine the spontaneity of a process.

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Q: How do enthalpy and entropy relate to each other? If enthalpy is negative, does that mean that…

A: To measure spontaneity, both the terms, enthalpy and entropy, cannot be used individually that is…

Q: A hot rock ejected from a volcano’s lava fountain cools from 1100C to 40.0C, and its entropy…

A: Given: Initial temperature, T1=1100°C=1373.15 K Final temperature, T2=40°C=313.15 K Decrease in…

Q: The enthalpy for a certain process is 146.4 kJ/mol and the entropy for the process is 463.6 J/K.  At…

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Q: A typical resting person heats the surroundings at a rate of about 100 W. Estimate the entropy you…

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Q: If the normal boiling point of a liquid is 67 °C, and the standard molar entropy change for the…

A: Standard molar enthalpy change can be expressed in terms of standard molar entropy change and…

Q: 4. The entropy change for the process H2O(s) → H2O(1) is 22.1 J/K and requires that that…

A: Given:  ∆Ssystem = 22.1 J/K  qsystem = -qsurrounding = 6.0 KJ = 6000 J  Temperature (T) = 10°C = 283…

Q: Estimate the change in the entropy of the universe due to heat escaping from your home on a cold…

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Q: A reaction has AH = -112 kJ and ASan = 354 J/K. At what temperature is the change in entropy for the…

A: The given data contains, ∆H°reaction=-112 kJ∆S°reaction=354 J/K

Q: According to the third law of thermodynamics, at what temperature will entropy become zero? A. 0°…

A: Third law of Thermodynamics- The entropy of a perfectly crystalline solid approaches zero as the…

Q: Which Substance would have the greatest standard molar entropy?   N2(I) NO2(I) NO2(g) N2(g)

A: To find: The substance having the greatest standard molar entropy N2 (I) NO2 (I) NO2 (g) N2 (g)

Q: Which one of the systems would have more entropy and why if there's 3 particles w a total energy of…

A: The systems given are, Given: The number of particles is 3 And the total energy of particles is 12…